LHCb

Research group

Sub department

About

Precision Measurement of the Muon Charge Asymmetry from W-Boson Decays in pp Collisions at s=13 TeV in the Forward Region

Physical Review Letters American Physical Society (APS) 137:11 (2026) 111801

Authors:

R Aaij, M Abdelfatah, ASW Abdelmotteleb, C Abellan Beteta, F Abudinén, T Ackernley, AA Adefisoye, B Adeva, M Adinolfi, P Adlarson, C Agapopoulou, CA Aidala, Z Ajaltouni, S Akar, K Akiba, P Albicocco, J Albrecht, R Aleksiejunas, F Alessio, P Alvarez Cartelle, R Amalric, S Amato, JL Amey, Y Amhis, L An, L Anderlini, M Andersson, P Andreola, M Andreotti, S Andres Estrada, A Anelli, D Ao, C Arata, F Archilli, Z Areg, M Argenton, S Arguedas Cuendis, L Arnone, M Artuso, E Aslanides, R Ataíde Da Silva, M Atzeni, B Audurier, JA Authier, D Bacher, I Bachiller Perea, S Bachmann, M Bachmayer, JJ Back, ZB Bai, P Baladron Rodriguez, V Balagura, A Balboni, W Baldini, Z Baldwin, L Balzani, H Bao, J Baptista de Souza Leite, C Barbero Pretel, M Barbetti, IR Barbosa, RJ Barlow, M Barnyakov, S Barsuk, W Barter, J Bartz, S Bashir, B Batsukh, PB Battista, A Bavarchee, A Bay, A Beck, M Becker, F Bedeschi, IB Bediaga, NA Behling, S Belin, A Bellavista, I Belov, I Belyaev, G Benane, G Bencivenni, E Ben-Haim, R Bernet, A Bertolin, F Betti, J Bex, O Bezshyyko, S Bhattacharya, MS Bieker, NV Biesuz, A Biolchini, M Birch, FCR Bishop, A Bitadze, A Bizzeti, T Blake, F Blanc, JE Blank, S Blusk, JA Boelhauve, O Boente Garcia, T Boettcher, A Bohare, C Bolognani, R Bolzonella, RB Bonacci, A Bordelius, F Borgato, S Borghi, M Borsato, JT Borsuk, E Bottalico, SA Bouchiba, M Bovill, TJV Bowcock, A Boyer, C Bozzi, JD Brandenburg, A Brea Rodriguez, N Breer, C Breitfeld, J Brodzicka, J Brown, D Brundu, E Buchanan, M Burgos Marcos, C Burr, C Buti, JS Butter, J Buytaert, W Byczynski, S Cadeddu, H Cai, Y Cai, A Caillet, R Calabrese, L Calefice, M Calvi, M Calvo Gomez, P Camargo Magalhaes, JI Cambon Bouzas, P Campana, AC Campos, AF Campoverde Quezada, Y Cao, S Capelli, M Caporale, L Capriotti, R Caravaca-Mora, A Carbone, L Carcedo Salgado, R Cardinale, A Cardini, P Carniti, L Carus, A Casais Vidal, R Caspary, G Casse, M Cattaneo, G Cavallero, V Cavallini, S Celani, I Celestino, S Cesare, AJ Chadwick, I Chahrour, M Charles, Ph Charpentier, E Chatzianagnostou, R Cheaib, M Chefdeville, C Chen, J Chen, S Chen, Z Chen, A Chen Hu, M Cherif, A Chernov, S Chernyshenko, X Chiotopoulos, G Chizhik, V Chobanova, M Chrzaszcz, V Chulikov, P Ciambrone, X Cid Vidal, G Ciezarek, P Cifra, PEL Clarke, M Clemencic, HV Cliff, J Closier, C Cocha Toapaxi, V Coco, J Cogan, E Cogneras, L Cojocariu, S Collaviti, P Collins, T Colombo, M Colonna, A Comerma-Montells, L Congedo, J Connaughton, A Contu, N Cooke, G Cordova, C Coronel, I Corredoira, A Correia, G Corti, GC Costantino, J Cottee Meldrum, B Couturier, DC Craik, N Crepet, M Cruz Torres, M Cubero Campos, E Curras Rivera, R Currie, CL Da Silva, X Dai, E Dall’Occo, J Dalseno, C D’Ambrosio, J Daniel, G Darze, A Davidson, JE Davies, O De Aguiar Francisco, C De Angelis, F De Benedetti, J de Boer, K De Bruyn, S De Capua, M De Cian, U De Freitas Carneiro Da Graca, E De Lucia, JM De Miranda, L De Paula, M De Serio, P De Simone, F De Vellis, JA de Vries, F Debernardis, D Decamp, S Dekkers, L Del Buono, B Delaney, J Deng, V Denysenko, O Deschamps, F Dettori, B Dey, P Di Nezza, S Ding, Y Ding, L Dittmann, AD Docheva, A Doheny, C Dong, F Dordei, AC dos Reis, AD Dowling, L Dreyfus, W Duan, P Duda, L Dufour, V Duk, P Durante, MM Duras, JM Durham, OD Durmus, A Dziurda, S Easo, E Eckstein, U Egede, S Eisenhardt, E Ejopu, L Eklund, M Elashri, D Elizondo Blanco, J Ellbracht, S Ely, A Ene, J Eschle, T Evans, F Fabiano, S Faghih, LN Falcao, B Fang, R Fantechi, L Fantini, M Faria, K Farmer, F Fassin, D Fazzini, L Felkowski, C Feng, M Feng, A Fernandez Casani, M Fernandez Gomez, AD Fernez, F Ferrari, F Ferreira Rodrigues, M Ferrillo, M Ferro-Luzzi, RA Fini, M Fiorini, M Firlej, KL Fischer, DS Fitzgerald, C Fitzpatrick, T Fiutowski, F Fleuret, A Fomin, M Fontana, LA Foreman, R Forty, D Foulds-Holt, V Franco Lima, M Franco Sevilla, M Frank, E Franzoso, G Frau, C Frei, DA Friday, J Fu, Q Führing, T Fulghesu, G Galati, MD Galati, A Gallas Torreira, D Galli, S Gambetta, M Gandelman, P Gandini, B Ganie, H Gao, R Gao, TQ Gao, Y Gao, Y Gao, Y Gao, LM Garcia Martin, P Garcia Moreno, J García Pardiñas, P Gardner, L Garrido, C Gaspar, A Gavrikov, LL Gerken, E Gersabeck, M Gersabeck, T Gershon, S Ghizzo, Z Ghorbanimoghaddam, FI Giasemis, V Gibson, HK Giemza, AL Gilman, M Giovannetti, A Gioventù, L Girardey, MA Giza, FC Glaser, VV Gligorov, C Göbel, L Golinka-Bezshyyko, E Golobardes, A Golutvin, S Gomez Fernandez, W Gomulka, F Goncalves Abrantes, I Gonçales Vaz, M Goncerz, G Gong, JA Gooding, C Gotti, E Govorkova, JP Grabowski, LA Granado Cardoso, E Graugés, E Graverini, L Grazette, G Graziani, AT Grecu, NA Grieser, L Grillo, C Gu, M Guarise, L Guerry, A-K Guseinov, Y Guz, T Gys, K Habermann, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, S Haken, G Hallett, PM Hamilton, Q Han, X Han, S Hansmann-Menzemer, N Harnew, TJ Harris, M Hartmann, S Hashmi, J He, N Heatley, A Hedes, F Hemmer, C Henderson, R Henderson, RDL Henderson, AM Hennequin, K Hennessy, J Herd, P Herrero Gascon, J Heuel, A Heyn, A Hicheur, G Hijano Mendizabal, J Horswill, R Hou, Y Hou, DC Houston, N Howarth, W Hu, X Hu, W Hulsbergen, RJ Hunter, D Hutchcroft, M Idzik, P Ilten, A Iohner, H Jage, SJ Jaimes Elles, S Jakobsen, T Jakoubek, E Jans, A Jawahery, C Jayaweera, A Jelavic, V Jevtic, Z Jia, E Jiang, X Jiang, Y Jiang, YJ Jiang, E Jimenez Moya, N Jindal, M John, A John Rubesh Rajan, D Johnson, CR Jones, S Joshi, B Jost, J Juan Castella, N Jurik, I Juszczak, K Kalecinska, D Kaminaris, S Kandybei, M Kane, Y Kang, C Kar, M Karacson, A Kauniskangas, JW Kautz, MK Kazanecki, F Keizer, M Kenzie, T Ketel, B Khanji, S Kholodenko, G Khreich, F Kiraz, T Kirn, VS Kirsebom, S Klaver, N Kleijne, A Kleimenova, DK Klekots, K Klimaszewski, MR Kmiec, T Knospe, R Kolb, S Koliiev, L Kolk, A Konoplyannikov, P Kopciewicz, P Koppenburg, A Korchin, I Kostiuk, O Kot, S Kotriakhova, E Kowalczyk, O Kravcov, M Kreps, W Krupa, W Krzemien, O Kshyvanskyi, S Kubis, M Kucharczyk, A Kupsc, V Kushnir, B Kutsenko, J Kvapil, I Kyryllin, D Lacarrere, P Laguarta Gonzalez, A Lai, A Lampis, D Lancierini, C Landesa Gomez, JJ Lane, G Lanfranchi, C Langenbruch, J Langer, T Latham, F Lazzari, C Lazzeroni, R Le Gac, H Lee, R Lefèvre, M Lehuraux, E Lemos Cid, O Leroy, T Lesiak, ED Lesser, B Leverington, A Li, C Li, C Li, H Li, J Li, K Li, L Li, P Li, P-R Li, Q Li, T Li, T Li, Y Li, Y Li, Y Li, Z Lian, Q Liang, X Liang, Z Liang, S Libralon, A Lightbody, C Lin, T Lin, R Lindner, H Linton, R Litvinov, D Liu, FL Liu, G Liu, K Liu, S Liu, W Liu, Y Liu, Y Liu, YL Liu, G Loachamin Ordonez, I Lobo, A Lobo Salvia, A Loi, T Long, FCL Lopes, JH Lopes, A Lopez Huertas, C Lopez Iribarnegaray, Q Lu, C Lucarelli, D Lucchesi, M Lucio Martinez, Y Luo, A Lupato, M Lupberger, E Luppi, K Lynch, S Lyu, X-R Lyu, H Ma, S Maccolini, F Machefert, F Maciuc, B Mack, I Mackay, LM Mackey, LR Madhan Mohan, MJ Madurai, D Magdalinski, JJ Malczewski, S Malde, L Malentacca, G Manca, G Mancinelli, C Mancuso, R Manera Escalero, A Mangalasseri, FM Manganella, D Manuzzi, S Mao, D Marangotto, JF Marchand, R Marchevski, U Marconi, E Mariani, S Mariani, C Marin Benito, J Marks, AM Marshall, L Martel, G Martelli, G Martellotti, L Martinazzoli, M Martinelli, D Martinez Gomez, D Martinez Santos, F Martinez Vidal, A Martorell I Granollers, A Massafferri, R Matev, A Mathad, C Matteuzzi, KR Mattioli, A Mauri, E Maurice, J Mauricio, P Mayencourt, J Mazorra de Cos, M Mazurek, D Mazzanti Tarancon, M McCann, NT McHugh, A McNab, R McNulty, B Meadows, D Melnychuk, D Mendoza Granada, P Menendez Valdes Perez, FM Meng, M Merk, A Merli, L Meyer Garcia, D Miao, H Miao, M Mikhasenko, DA Milanes, A Minotti, E Minucci, B Mitreska, DS Mitzel, R Mocanu, A Modak, L Moeser, RD Moise, EF Molina Cardenas, T Mombächer, M Monk, T Monnard, S Monteil, A Morcillo Gomez, G Morello, MJ Morello, MP Morgenthaler, A Moro, J Moron, W Morren, AB Morris, AG Morris, R Mountain, Z Mu, E Muhammad, F Muheim, M Mulder, K Müller, F Muñoz-Rojas, V Mytrochenko, P Naik, T Nakada, R Nandakumar, G Napoletano, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, J Nicolini, D Nicotra, EM Niel, L Nisi, Q Niu, BK Njoki, P Nogarolli, P Nogga, C Normand, J Novoa Fernandez, G Nowak, C Nunez, HN Nur, A Oblakowska-Mucha, T Oeser, O Okhrimenko, R Oldeman, F Oliva, E Olivart Pino, M Olocco, RH O’Neil, JS Ordonez Soto, D Osthues, JM Otalora Goicochea, P Owen, A Oyanguren, O Ozcelik, F Paciolla, A Padee, KO Padeken, B Pagare, T Pajero, A Palano, L Palini, M Palutan, C Pan, X Pan, S Panebianco, S Paniskaki, L Paolucci, A Papanestis, M Pappagallo, LL Pappalardo, C Pappenheimer, C Parkes, D Parmar, G Passaleva, D Passaro, A Pastore, M Patel, J Patoc, C Patrignani, A Paul, CJ Pawley, A Pellegrino, J Peng, X Peng, M Pepe Altarelli, S Perazzini, H Pereira Da Costa, M Pereira Martinez, A Pereiro Castro, C Perez, P Perret, A Perrevoort, A Perro, MJ Peters, K Petridis, A Petrolini, S Pezzulo, JP Pfaller, H Pham, L Pica, M Piccini, L Piccolo, B Pietrzyk, RN Pilato, D Pinci, F Pisani, M Pizzichemi, VM Placinta, M Plo Casasus, T Poeschl, F Polci, M Poli Lener, A Poluektov, I Polyakov, E Polycarpo, S Ponce, D Popov, K Popp, K Prasanth, C Prouve, D Provenzano, V Pugatch, A Puicercus Gomez, G Punzi, JR Pybus, Q Qian, W Qian, N Qin, R Quagliani, RI Rabadan Trejo, R Racz, JH Rademacker, M Rama, M Ramírez García, V Ramos De Oliveira, M Ramos Pernas, MS Rangel, G Raven, M Rebollo De Miguel, F Redi, J Reich, F Reiss, Z Ren, PK Resmi, M Ribalda Galvez, R Ribatti, G Ricart, D Riccardi, S Ricciardi, K Richardson, M Richardson-Slipper, F Riehn, K Rinnert, P Robbe, G Robertson, E Rodrigues, A Rodriguez Alvarez, E Rodriguez Fernandez, JA Rodriguez Lopez, E Rodriguez Rodriguez, J Roensch, A Rogovskiy, DL Rolf, P Roloff, V Romanovskiy, A Romero Vidal, G Romolini, F Ronchetti, T Rong, M Rotondo, MS Rudolph, M Ruiz Diaz, RA Ruiz Fernandez, J Ruiz Vidal, JJ Saavedra-Arias, JJ Saborido Silva, SER Sacha Emile R., D Sahoo, N Sahoo, B Saitta, M Salomoni, I Sanderswood, R Santacesaria, C Santamarina Rios, M Santimaria, L Santoro, E Santovetti, A Saputi, A Sarnatskiy, G Sarpis, M Sarpis, C Satriano, A Satta, M Saur, H Sazak, F Sborzacchi, A Scarabotto, S Schael, S Scherl, M Schiller, H Schindler, M Schmelling, B Schmidt, N Schmidt, S Schmitt, H Schmitz, O Schneider, A Schopper, N Schulte, MH Schune, G Schwering, B Sciascia, A Sciuccati, G Scriven, I Segal, S Sellam, T Senger, M Senghi Soares, A Sergi, N Serra, L Sestini, B Sevilla Sanjuan, Y Shang, DM Shangase, RS Sharma, L Shchutska, T Shears, J Shen, Z Shen, S Sheng, B Shi, J Shi, Q Shi, WS Shi, E Shmanin, R Silva Coutinho, G Simi, S Simone, M Singha, I Siral, N Skidmore, T Skwarnicki, MW Slater, E Smith, M Smith, L Soares Lavra, MD Sokoloff, FJP Soler, A Solomin, K Solovieva, NS Sommerfeld, R Song, Y Song, Y Song, YS Song, FL Souza De Almeida, B Souza De Paula, KM Sowa, E Spadaro Norella, E Spedicato, JG Speer, P Spradlin, F Stagni, M Stahl, S Stahl, S Stanislaus, M Stefaniak, O Steinkamp, Y Su, F Suljik, J Sun, J Sun, L Sun, D Sundfeld, W Sutcliffe, P Svihra, V Svintozelskyi, K Swientek, F Swystun, A Szabelski, T Szumlak, Y Tan, Y Tang, YT Tang, MD Tat, JA Teijeiro Jimenez, F Terzuoli, F Teubert, E Thomas, DJD Thompson, AR Thomson-Strong, H Tilquin, V Tisserand, S T’Jampens, M Tobin, TT Todorov, L Tomassetti, G Tonani, X Tong, T Tork, L Toscano, DY Tou, C Trippl, G Tuci, N Tuning, LH Uecker, A Ukleja, DJ Unverzagt, A Upadhyay, B Urbach, A Usachov, U Uwer, V Vagnoni, A Vaitkevicius, V Valcarce Cadenas, G Valenti, N Valls Canudas, J van Eldik, H Van Hecke, E van Herwijnen, CB Van Hulse, R Van Laak, M van Veghel, G Vasquez, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, J Velilla Serna, JJ Velthuis, M Veltri, A Venkateswaran, M Verdoglia, M Vesterinen, W Vetens, D Vico Benet, P Vidrier Villalba, M Vieites Diaz, X Vilasis-Cardona, E Vilella Figueras, A Villa, P Vincent, B Vivacqua, FC Volle, D vom Bruch, K Vos, C Vrahas, J Wagner, J Walsh, N Walter, EJ Walton, G Wan, A Wang, B Wang, C Wang, G Wang, H Wang, J Wang, J Wang, J Wang, J Wang, M Wang, NW Wang, R Wang, X Wang, X Wang, XW Wang, Y Wang, Y Wang, YH Wang, Z Wang, Z Wang, JA Ward, M Waterlaat, NK Watson, D Websdale, Y Wei, Z Weida, J Wendel, BDC Westhenry, C White, M Whitehead, E Whiter, AR Wiederhold, D Wiedner, MA Wiegertjes, C Wild, G Wilkinson, MK Wilkinson, M Williams, MJ Williams, MRJ Williams, R Williams, S Williams, Z Williams, FF Wilson, M Winn, W Wislicki, M Witek, L Witola, T Wolf, E Wood, G Wormser, SA Wotton, H Wu, J Wu, X Wu, Y Wu, Z Wu, K Wyllie, S Xian, Z Xiang, Y Xie, TX Xing, A Xu, L Xu, M Xu, R Xu, Z Xu, Z Xu, Z Xu, S Yadav, K Yang, X Yang, Y Yang, Y Yang, Z Yang, Z Yang, H Yeung, H Yin, X Yin, CY Yu, J Yu, X Yuan, Y Yuan, JA Zamora Saa, M Zavertyaev, M Zdybal, F Zenesini, C Zeng, M Zeng, SH Zeng, C Zhang, D Zhang, J Zhang, L Zhang, R Zhang, S Zhang, SL Zhang, Y Zhang, Z Zhang, Y Zhao, A Zhelezov, SZ Zheng, XZ Zheng, Y Zheng, T Zhou, X Zhou, V Zhovkovska, LZ Zhu, X Zhu, X Zhu, Y Zhu, V Zhukov, J Zhuo, D Zuliani, G Zunica

Abstract:

A precision measurement of the muon charge asymmetry from W -boson decays in proton-proton collisions at s = 13 TeV is presented. The analysis utilizes data corresponding to an integrated luminosity of 5.1 fb − 1 , recorded by the LHCb detector during 2016, 2017, and 2018. The asymmetry is measured for muons with transverse momentum between 25 and 55 GeV and pseudorapidity between 2.0 and 4.5. This result represents the most precise determination of the muon charge asymmetry in the forward region to date, exhibiting excellent agreement with next-to-next-to-leading-order predictions in perturbative quantum chromodynamics. The measured asymmetries are corrected for experimental efficiencies, resolution, and final-state photon radiation.

Search for τ−→ μ−μ+μ− decays at the LHCb experiment with Run 2 data

Journal of High Energy Physics 2026:9 (2026) 69

Authors:

R Aaij, ASW Abdelmotteleb, C Abellan Beteta, F Abudinén, T Ackernley, AA Adefisoye, B Adeva, M Adinolfi, P Adlarson, C Agapopoulou, CA Aidala, Z Ajaltouni, S Akar, K Akiba, M Akthar, P Albicocco, J Albrecht, R Aleksiejunas, F Alessio, P Alvarez Cartelle, R Amalric, S Amato, JL Amey, Y Amhis, L An, L Anderlini, M Andersson, P Andreola, M Andreotti, S Andres Estrada, A Anelli, D Ao, C Arata, F Archilli, Z Areg, M Argenton, S Arguedas Cuendis, L Arnone, A Artamonov, M Artuso, E Aslanides, R Ataíde Da Silva, M Atzeni, B Audurier, JA Authier, D Bacher, I Bachiller Perea, S Bachmann, M Bachmayer, JJ Back, P Baladron Rodriguez, V Balagura, A Balboni, W Baldini, Z Baldwin, L Balzani, H Bao, J Baptista de Souza Leite, C Barbero Pretel, M Barbetti, IR Barbosa, RJ Barlow, M Barnyakov, S Barsuk, W Barter, J Bartz, S Bashir, B Batsukh, PB Battista, A Bavarchee, A Bay, A Beck, M Becker, F Bedeschi, IB Bediaga, NA Behling, S Belin, A Bellavista, K Belous, I Belov, I Belyaev, E Ben-Haim, G Benane, G Bencivenni, A Berezhnoy, R Bernet, S Bernet Andres, A Bertolin, F Betti, J Bex, O Bezshyyko, S Bhattacharya, MS Bieker, NV Biesuz, A Biolchini, M Birch, FCR Bishop, A Bitadze, A Bizzeti, T Blake, F Blanc, JE Blank, S Blusk, V Bocharnikov, JA Boelhauve, O Boente Garcia, T Boettcher, A Bohare, A Boldyrev, C Bolognani, R Bolzonella, RB Bonacci, N Bondar, A Bordelius, F Borgato, S Borghi, M Borsato, JT Borsuk, E Bottalico, SA Bouchiba, M Bovill, TJV Bowcock, A Boyer, C Bozzi, JD Brandenburg, A Brea Rodriguez, N Breer, J Brodzicka, J Brown, D Brundu, E Buchanan, M Burgos Marcos, AT Burke, C Burr, C Buti, JS Butter, J Buytaert, W Byczynski, S Cadeddu, H Cai, Y Cai, A Caillet, R Calabrese, S Calderon Ramirez, L Calefice, M Calvi, M Calvo Gomez, P Camargo Magalhaes, JI Cambon Bouzas, P Campana, AC Campos, AF Campoverde Quezada, Y Cao, S Capelli, M Caporale, L Capriotti, R Caravaca-Mora, A Carbone, L Carcedo Salgado, R Cardinale, A Cardini, P Carniti, L Carus, A Casais Vidal, R Caspary, G Casse, M Cattaneo, G Cavallero, V Cavallini, S Celani, I Celestino, S Cesare, AJ Chadwick, I Chahrour, H Chang, M Charles, Ph Charpentier, E Chatzianagnostou, R Cheaib, M Chefdeville, C Chen, J Chen, S Chen, Z Chen, A Chen Hu, M Cherif, A Chernov, S Chernyshenko, X Chiotopoulos, V Chobanova, M Chrzaszcz, A Chubykin, V Chulikov, P Ciambrone, X Cid Vidal, G Ciezarek, P Cifra, PEL Clarke, M Clemencic, HV Cliff, J Closier, C Cocha Toapaxi, V Coco, J Cogan, E Cogneras, L Cojocariu, S Collaviti, P Collins, T Colombo, M Colonna, A Comerma-Montells, L Congedo, J Connaughton, A Contu, N Cooke, G Cordova, C Coronel, I Corredoira, A Correia, G Corti, J Cottee Meldrum, B Couturier, DC Craik, M Cruz Torres, M Cubero Campos, E Curras Rivera, R Currie, C D’Ambrosio, CL Da Silva, S Dadabaev, X Dai, E Dall’Occo, J Dalseno, J Daniel, G Darze, A Davidson, JE Davies, O De Aguiar Francisco, C De Angelis, F De Benedetti, J de Boer, K De Bruyn, S De Capua, M De Cian, U De Freitas Carneiro Da Graca, E De Lucia, JM De Miranda, L De Paula, M De Serio, P De Simone, F De Vellis, JA de Vries, F Debernardis, D Decamp, S Dekkers, L Del Buono, B Delaney, J Deng, V Denysenko, O Deschamps, F Dettori, B Dey, P Di Nezza, I Diachkov, S Didenko, S Ding, Y Ding, L Dittmann, V Dobishuk, AD Docheva, A Doheny, C Dong, AM Donohoe, F Dordei, AC dos Reis, AD Dowling, L Dreyfus, W Duan, P Duda, L Dufour, V Duk, P Durante, MM Duras, JM Durham, OD Durmus, A Dziurda, A Dzyuba, S Easo, E Eckstein, U Egede, A Egorychev, V Egorychev, S Eisenhardt, E Ejopu, L Eklund, M Elashri, D Elizondo Blanco, J Ellbracht, S Ely, A Ene, J Eschle, T Evans, F Fabiano, S Faghih, LN Falcao, B Fang, R Fantechi, L Fantini, M Faria, K Farmer, F Fassin, D Fazzini, L Felkowski, C Feng, M Feng, A Fernandez Casani, M Fernandez Gomez, AD Fernez, F Ferrari, F Ferreira Rodrigues, M Ferrillo, M Ferro-Luzzi, S Filippov, RA Fini, M Fiorini, M Firlej, KL Fischer, DS Fitzgerald, C Fitzpatrick, T Fiutowski, F Fleuret, A Fomin, M Fontana, LA Foreman, R Forty, D Foulds-Holt, V Franco Lima, M Franco Sevilla, M Frank, E Franzoso, G Frau, C Frei, DA Friday, J Fu, T Fulghesu, Q Führing, G Galati, MD Galati, A Gallas Torreira, D Galli, S Gambetta, M Gandelman, P Gandini, B Ganie, H Gao, R Gao, TQ Gao, Y Gao, Y Gao, Y Gao, LM Garcia Martin, P Garcia Moreno, J García Pardiñas, P Gardner, L Garrido, C Gaspar, A Gavrikov, LL Gerken, E Gersabeck, M Gersabeck, T Gershon, S Ghizzo, Z Ghorbanimoghaddam, FI Giasemis, V Gibson, HK Giemza, AL Gilman, M Giovannetti, A Gioventù, L Girardey, MA Giza, FC Glaser, VV Gligorov, L Golinka-Bezshyyko, E Golobardes, D Golubkov, A Golutvin, S Gomez Fernandez, W Gomulka, F Goncalves Abrantes, M Goncerz, G Gong, I Gonçales Vaz, JA Gooding, IV Gorelov, C Gotti, E Govorkova, JP Grabowski, LA Granado Cardoso, E Graugés, E Graverini, L Grazette, G Graziani, AT Grecu, NA Grieser, L Grillo, S Gromov, C Gu, M Guarise, L Guerry, A-K Guseinov, E Gushchin, Y Guz, T Gys, C Göbel, K Habermann, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, S Haken, G Hallett, PM Hamilton, J Hammerich, Q Han, X Han, S Hansmann-Menzemer, L Hao, N Harnew, TH Harris, M Hartmann, S Hashmi, J He, N Heatley, A Hedes, F Hemmer, C Henderson, R Henderson, RDL Henderson, AM Hennequin, K Hennessy, L Henry, J Herd, P Herrero Gascon, J Heuel, A Heyn, A Hicheur, G Hijano Mendizabal, J Horswill, R Hou, Y Hou, DC Houston, N Howarth, W Hu, X Hu, W Hulsbergen, RJ Hunter, M Hushchyn, D Hutchcroft, M Idzik, D Ilin, P Ilten, A Iniukhin, A Iohner, A Ishteev, K Ivshin, H Jage, SJ Jaimes Elles, S Jakobsen, T Jakoubek, E Jans, BK Jashal, A Jawahery, C Jayaweera, A Jelavic, V Jevtic, Z Jia, E Jiang, X Jiang, Y Jiang, YJ Jiang, E Jimenez Moya, N Jindal, M John, A John Rubesh Rajan, D Johnson, CR Jones, S Joshi, B Jost, J Juan Castella, N Jurik, I Juszczak, K Kalecinska, D Kaminaris, S Kandybei, M Kane, Y Kang, C Kar, M Karacson, A Kauniskangas, JW Kautz, MK Kazanecki, F Keizer, M Kenzie, T Ketel, B Khanji, A Kharisova, S Kholodenko, G Khreich, F Kiraz, T Kirn, VS Kirsebom, S Klaver, N Kleijne, A Kleimenova, DK Klekots, K Klimaszewski, MR Kmiec, T Knospe, R Kolb, S Koliiev, L Kolk, A Konoplyannikov, P Kopciewicz, P Koppenburg, A Korchin, I Kostiuk, O Kot, S Kotriakhova, E Kowalczyk, A Kozachuk, P Kravchenko, L Kravchuk, O Kravcov, M Kreps, P Krokovny, W Krupa, W Krzemien, O Kshyvanskyi, S Kubis, M Kucharczyk, V Kudryavtsev, E Kulikova, A Kupsc, V Kushnir, B Kutsenko, J Kvapil, I Kyryllin, D Lacarrere, P Laguarta Gonzalez, A Lai, A Lampis, D Lancierini, C Landesa Gomez, JJ Lane, G Lanfranchi, C Langenbruch, J Langer, T Latham, F Lazzari, C Lazzeroni, R Le Gac, H Lee, A Leflat, R Lefèvre, S Legotin, M Lehuraux, E Lemos Cid, O Leroy, T Lesiak, ED Lesser, B Leverington, A Li, C Li, C Li, H Li, J Li, K Li, L Li, M Li, P Li, P-R Li, Q Li, T Li, T Li, Y Li, Y Li, Y Li, Z Lian, Q Liang, X Liang, Z Liang, S Libralon, A Lightbody, C Lin, T Lin, R Lindner, H Linton, R Litvinov, D Liu, FL Liu, G Liu, K Liu, S Liu, W Liu, Y Liu, Y Liu, YL Liu, G Loachamin Ordonez, I Lobo, A Lobo Salvia, A Loi, T Long, FCL Lopes, JH Lopes, A Lopez Huertas, C Lopez Iribarnegaray, Q Lu, C Lucarelli, D Lucchesi, M Lucio Martinez, Y Luo, A Lupato, E Luppi, K Lynch, S Lyu, X-R Lyu, S López Soliño, GM Ma, H Ma, S Maccolini, F Machefert, F Maciuc, B Mack, I Mackay, LM Mackey, LR Madhan Mohan, MJ Madurai, D Magdalinski, D Maisuzenko, JJ Malczewski, S Malde, L Malentacca, A Malinin, T Maltsev, G Manca, G Mancinelli, C Mancuso, R Manera Escalero, FM Manganella, D Manuzzi, D Marangotto, JF Marchand, R Marchevski, U Marconi, E Mariani, S Mariani, C Marin Benito, J Marks, AM Marshall, L Martel, G Martelli, G Martellotti, L Martinazzoli, M Martinelli, D Martinez Gomez, D Martinez Santos, F Martinez Vidal, A Martorell i Granollers, A Massafferri, R Matev, A Mathad, V Matiunin, C Matteuzzi, KR Mattioli, A Mauri, E Maurice, J Mauricio, P Mayencourt, J Mazorra de Cos, M Mazurek, D Mazzanti Tarancon, M McCann, NT McHugh, A McNab, R McNulty, B Meadows, D Melnychuk, D Mendoza Granada, P Menendez Valdes Perez, FM Meng, M Merk, A Merli, L Meyer Garcia, D Miao, H Miao, M Mikhasenko, DA Milanes, A Minotti, E Minucci, T Miralles, B Mitreska, DS Mitzel, R Mocanu, A Modak, L Moeser, RD Moise, EF Molina Cardenas, T Mombächer, M Monk, T Monnard, S Monteil, A Morcillo Gomez, G Morello, MJ Morello, MP Morgenthaler, A Moro, J Moron, W Morren, AB Morris, AG Morris, R Mountain, Z Mu, E Muhammad, F Muheim, M Mulder, R Murta, F Muñoz-Rojas, V Mytrochenko, K Müller, P Naik, T Nakada, R Nandakumar, T Nanut, G Napoletano, I Nasteva, M Needham, E Nekrasova, N Neri, S Neubert, N Neufeld, P Neustroev, J Nicolini, D Nicotra, EM Niel, N Nikitin, L Nisi, Q Niu, BK Njoki, P Nogarolli, P Nogga, C Normand, J Novoa Fernandez, G Nowak, C Nunez, HN Nur, RH O’Neil, A Oblakowska-Mucha, V Obraztsov, T Oeser, A Okhotnikov, O Okhrimenko, R Oldeman, F Oliva, E Olivart Pino, M Olocco, JS Ordonez Soto, D Osthues, JM Otalora Goicochea, P Owen, A Oyanguren, O Ozcelik, F Paciolla, A Padee, KO Padeken, B Pagare, T Pajero, A Palano, L Palini, M Palutan, C Pan, X Pan, S Panebianco, S Paniskaki, G Panshin, L Paolucci, A Papanestis, M Pappagallo, LL Pappalardo, C Pappenheimer, C Parkes, D Parmar, G Passaleva, D Passaro, A Pastore, M Patel, J Patoc, C Patrignani, A Paul, CJ Pawley, A Pellegrino, J Peng, X Peng, M Pepe Altarelli, S Perazzini, D Pereima, H Pereira Da Costa, M Pereira Martinez, A Pereiro Castro, C Perez, P Perret, A Perrevoort, A Perro, MJ Peters, K Petridis, A Petrolini, S Pezzulo, JP Pfaller, H Pham, L Pica, M Piccini, L Piccolo, B Pietrzyk, G Pietrzyk, RN Pilato, D Pinci, F Pisani, M Pizzichemi, VM Placinta, M Plo Casasus, T Poeschl, F Polci, M Poli Lener, A Poluektov, N Polukhina, I Polyakov, E Polycarpo, S Ponce, D Popov, K Popp, S Poslavskii, K Prasanth, C Prouve, D Provenzano, V Pugatch, A Puicercus Gomez, G Punzi, JR Pybus, Q Qian, W Qian, N Qin, R Quagliani, RI Rabadan Trejo, R Racz, JH Rademacker, M Ramírez García, M Rama, V Ramos De Oliveira, M Ramos Pernas, MS Rangel, F Ratnikov, G Raven, M Rebollo De Miguel, F Redi, J Reich, F Reiss, Z Ren, PK Resmi, M Ribalda Galvez, R Ribatti, G Ricart, D Riccardi, S Ricciardi, K Richardson, M Richardson-Slipper, F Riehn, K Rinnert, P Robbe, G Robertson, E Rodrigues, A Rodriguez Alvarez, E Rodriguez Fernandez, JA Rodriguez Lopez, E Rodriguez Rodriguez, J Roensch, A Rogachev, A Rogovskiy, DL Rolf, P Roloff, V Romanovskiy, A Romero Vidal, G Romolini, F Ronchetti, T Rong, M Rotondo, SR Roy, MS Rudolph, M Ruiz Diaz, RA Ruiz Fernandez, J Ruiz Vidal, JJ Saavedra-Arias, JJ Saborido Silva, SER Sacha Emile R., N Sagidova, D Sahoo, N Sahoo, B Saitta, M Salomoni, I Sanderswood, R Santacesaria, C Santamarina Rios, M Santimaria, L Santoro, E Santovetti, A Saputi, D Saranin, A Sarnatskiy, G Sarpis, M Sarpis, C Satriano, A Satta, M Saur, D Savrina, H Sazak, F Sborzacchi, A Scarabotto, S Schael, S Scherl, M Schiller, H Schindler, M Schmelling, B Schmidt, N Schmidt, S Schmitt, H Schmitz, O Schneider, A Schopper, N Schulte, MH Schune, G Schwering, B Sciascia, A Sciuccati, G Scriven, I Segal, S Sellam, A Semennikov, T Senger, M Senghi Soares, A Sergi, N Serra, L Sestini, A Seuthe, B Sevilla Sanjuan, Y Shang, DM Shangase, M Shapkin, RS Sharma, I Shchemerov, L Shchutska, T Shears, L Shekhtman, J Shen, Z Shen, S Sheng, V Shevchenko, B Shi, J Shi, Q Shi, WS Shi, Y Shimizu, E Shmanin, R Shorkin, JD Shupperd, R Silva Coutinho, G Simi, S Simone, M Singha, I Siral, N Skidmore, T Skwarnicki, MW Slater, E Smith, M Smith, L Soares Lavra, MD Sokoloff, FJP Soler, A Solomin, A Solovev, K Solovieva, NS Sommerfeld, R Song, Y Song, Y Song, YS Song, FL Souza De Almeida, B Souza De Paula, KM Sowa, E Spadaro Norella, E Spedicato, JG Speer, P Spradlin, F Stagni, M Stahl, S Stahl, S Stanislaus, M Stefaniak, O Steinkamp, D Strekalina, Y Su, F Suljik, J Sun, J Sun, L Sun, D Sundfeld, W Sutcliffe, P Svihra, V Svintozelskyi, K Swientek, F Swystun, A Szabelski, T Szumlak, S T’Jampens, Y Tan, Y Tang, YT Tang, MD Tat, JA Teijeiro Jimenez, A Terentev, F Terzuoli, F Teubert, E Thomas, DJD Thompson, AR Thomson-Strong, H Tilquin, V Tisserand, M Tobin, TT Todorov, L Tomassetti, G Tonani, X Tong, T Tork, L Toscano, DY Tou, C Trippl, G Tuci, N Tuning, LH Uecker, A Ukleja, DJ Unverzagt, A Upadhyay, B Urbach, A Usachov, A Ustyuzhanin, U Uwer, V Vagnoni, A Vaitkevicius, V Valcarce Cadenas, G Valenti, N Valls Canudas, J van Eldik, H Van Hecke, E van Herwijnen, CB Van Hulse, R Van Laak, M van Veghel, G Vasquez, R Vazquez Gomez, P Vazquez Regueiro, S Vecchi, J Velilla Serna, JJ Velthuis, M Veltri, A Venkateswaran, M Verdoglia, M Vesterinen, W Vetens, D Vico Benet, P Vidrier Villalba, M Vieites Diaz, X Vilasis-Cardona, E Vilella Figueras, A Villa, P Vincent, B Vivacqua, FC Volle, D vom Bruch, N Voropaev, K Vos, C Vrahas, C Vázquez Sierra, J Wagner, J Walsh, EJ Walton, G Wan, A Wang, B Wang, C Wang, G Wang, H Wang, J Wang, J Wang, J Wang, J Wang, M Wang, NW Wang, R Wang, X Wang, X Wang, XW Wang, Y Wang, Y Wang, YH Wang, Z Wang, Z Wang, JA Ward, M Waterlaat, NK Watson, D Websdale, Y Wei, Z Weida, J Wendel, BDC Westhenry, C White, M Whitehead, E Whiter, AR Wiederhold, D Wiedner, MA Wiegertjes, C Wild, G Wilkinson, MK Wilkinson, M Williams, MJ Williams, MRJ Williams, R Williams, S Williams, Z Williams, FF Wilson, M Winn, W Wislicki, M Witek, L Witola, T Wolf, E Wood, G Wormser, SA Wotton, H Wu, J Wu, X Wu, Y Wu, Z Wu, K Wyllie, S Xian, Z Xiang, Y Xie, TX Xing, A Xu, L Xu, M Xu, Z Xu, Z Xu, Z Xu, S Yadav, K Yang, X Yang, Y Yang, Y Yang, Z Yang, V Yeroshenko, H Yeung, H Yin, X Yin, CY Yu, J Yu, X Yuan, Y Yuan, JA Zamora Saa, M Zavertyaev, M Zdybal, F Zenesini, C Zeng, M Zeng, C Zhang, D Zhang, J Zhang, L Zhang, R Zhang, S Zhang, SL Zhang, Y Zhang, YZ Zhang, Z Zhang, Y Zhao, A Zhelezov, SZ Zheng, XZ Zheng, Y Zheng, T Zhou, X Zhou, Y Zhou, V Zhovkovska, LZ Zhu, X Zhu, X Zhu, Y Zhu, V Zhukov, J Zhuo, D Zuliani, G Zunica

Abstract:

A search for the lepton-flavour-violating decay τ− → μ−μ+μ− is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. An upper limit of 1.9 (2.3) × 10−8 is set at the 90% (95%) confidence level on the branching fraction of the decay.

Testbeam characterization of a 3D silicon sensor read out by Timepix4

ArXiv 2609.04042 (2026)

Authors:

E Chatzianagnostou, MJ Madurai, K Akiba, D Bacher, R Bates, M van Beuzekom, T Bischoff, V Coco, R Dumps, T Evans, K Heijhoff, D Johnson, U Krämer, E Lemos Cid, D Oppenhuis, T Pajero, E Rodríguez Rodríguez, D Rolf

Observation of the $X(2370)$ in $J/ψ\rightarrowγK^{0}_{S}K^{0}_{S}π^{0}$ and $J/ψ\rightarrowγπ^{0}π^{0}η$

(2026)

Authors:

BESIII Collaboration, M Ablikim, MN Achasov, P Adlarson, XC Ai, CS Akondi, R Aliberti, A Amoroso, Q An, YH An, MS Anderson, Y Bai, O Bakina, HR Bao, XL Bao, M Barbagiovanni, V Batozskaya, K Begzsuren, N Berger, M Berlowski, MB Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, RA Briere, A Brueggemann, D Cabiati, H Cai, MH Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, XY Chai, JF Chang, TT Chang, GR Che, YZ Che, CH Chen, Chao Chen, G Chen, HS Chen, HY Chen, ML Chen, SJ Chen, SM Chen, T Chen, W Chen, XR Chen, XT Chen, XY Chen, YB Chen, YQ Chen, ZK Chen, J Cheng, LN Cheng, SK Choi, X Chu, G Cibinetto, F Cossio, J Cottee-Meldrum, HL Dai, JP Dai, XC Dai, A Dbeyssi, RE de Boer, D Dedovich, CQ Deng, ZY Deng, A Denig, I Denisenko, M Destefanis, F De Mori, E Di Fiore, XX Ding, Y Ding, YX Ding, J Dong, LY Dong, MY Dong, X Dong, ZJ Dong, MC Du, SX Du, Shaoxu Du, XL Du, YQ Du, YY Duan, ZH Duan, P Egorov, GF Fan, JJ Fan, YH Fan, J Fang, Jin Fang, SS Fang, WX Fang, YQ Fang, L Fava, F Feldbauer, G Felici, CQ Feng, JH Feng, QX Feng, YT Feng, M Fritsch, CD Fu, JL Fu, YW Fu, H Gao, Xu Gao, Y Gao, YN Gao, YY Gao, Yunong Gao, Z Gao, S Garbolino, I Garzia, L Ge, PT Ge, ZW Ge, C Geng, A Gilman, K Goetzen, J Gollub, JB Gong, JD Gong, L Gong, WX Gong, W Gradl, M Greco, MD Gu, MH Gu, CY Guan, AQ Guo, H Guo, JN Guo, LB Guo, MJ Guo, RP Guo, X Guo, YP Guo, Z Guo, A Guskov, J Gutierrez, JY Han, TT Han, X Han, F Hanisch, KD Hao, XQ Hao, FA Harris, CZ He, KK He, KL He, FH Heinsius, CH Heinz, YK Heng, C Herold, PC Hong, GY Hou, XT Hou, YR Hou, ZL Hou, HM Hu, JF Hu, QP Hu, SL Hu, T Hu, Y Hu, YX Hu, ZM Hu, GS Huang, KX Huang, LQ Huang, P Huang, XT Huang, YP Huang, YS Huang, T Hussain, N Hüsken, N in der Wiesche, J Jackson, Q Ji, QP Ji, W Ji, XB Ji, XL Ji, YY Ji, LK Jia, XQ Jia, D Jiang, SJ Jiang, XS Jiang, Y Jiang, JB Jiao, JK Jiao, Z Jiao, LCL Jin, S Jin, Y Jin, MQ Jing, XM Jing, T Johansson, S Kabana, XL Kang, XS Kang, BC Ke, V Khachatryan, A Khoukaz, OB Kolcu, B Kopf, L Kröger, L Krümmel, YY Kuang, X Kui, N Kumar, A Kupsc, W Kühn, Q Lan, WN Lan, TT Lei, M Lellmann, T Lenz, C Li, CH Li, CK Li, Chunkai Li, Cong Li, DM Li, F Li, G Li, HB Li, HJ Li, HL Li, HN Li, HP Li, Hui Li, JN Li, JS Li, JW Li, K Li, KL Li, LJ Li, LK Li, Lei Li, MH Li, MR Li, MT Li, PL Li, PR Li, QM Li, QX Li, R Li, S Li, SX Li, SY Li, Shanshan Li, T Li, TY Li, WD Li, WG Li, X Li, XH Li, XK Li, XL Li, XY Li, XZ Li, Y Li, YH Li, YB Li, YC Li, YG Li, YP Li, ZH Li, ZJ Li, ZL Li, ZX Li, ZY Li, C Liang, H Liang, YF Liang, YT Liang, ZZ Liang, GR Liao, LB Liao, MH Liao, YP Liao, J Libby, A Limphirat, CC Lin, CX Lin, DX Lin, T Lin, BJ Liu, BX Liu, C Liu, CX Liu, F Liu, FH Liu, Feng Liu, GM Liu, H Liu, HB Liu, HM Liu, Huihui Liu, JB Liu, JJ Liu, K Liu, KY Liu, Ke Liu, Kun Liu, L Liu, LC Liu, Lu Liu, MH Liu, PL Liu, Q Liu, SB Liu, T Liu, WM Liu, WT Liu, X Liu, XK Liu, XL Liu, XP Liu, XT Liu, XY Liu, Y Liu, YB Liu, Yi Liu, ZA Liu, ZD Liu, ZL Liu, ZQ Liu, ZX Liu, ZY Liu, XC Lou, HJ Lu, JG Lu, XL Lu, Y Lu, YH Lu, YP Lu, ZH Lu, CL Luo, JR Luo, JS Luo, MX Luo, T Luo, XL Luo, ZY Lv, XR Lyu, YF Lyu, YH Lyu, FC Ma, HL Ma, Heng Ma, JL Ma, LL Ma, LR Ma, QM Ma, RQ Ma, RY Ma, T Ma, XT Ma, XY Ma, FE Maas, I MacKay, M Maggiora, S Maity, S Malde, LM Mansur, YJ Mao, ZP Mao, S Marcello, A Marshall, FM Melendi, YH Meng, ZX Meng, G Mezzadri, H Miao, TJ Min, RE Mitchell, XH Mo, B Moses, N Yu Muchnoi, J Muskalla, Y Nefedov, F Nerling, H Neuwirth, Z Ning, S Nisar, QL Niu, WD Niu, Y Niu, C Normand, SL Olsen, Q Ouyang, IV Ovtin, S Pacetti, Y Pan, CY Pang, A Pathak, YP Pei, M Pelizaeus, GL Peng, HP Peng, XJ Peng, YY Peng, K Peters, K Petridis, JL Ping, RG Ping, S Plura, V Prasad, L Pöpping, FZ Qi, HR Qi, S Qian, WB Qian, CF Qiao, JH Qiao, JJ Qin, JL Qin, LQ Qin, LY Qin, PB Qin, XP Qin, XS Qin, ZH Qin, JF Qiu, ZH Qu, J Rademacker, K Ravindran, CF Redmer, A Rivetti, M Rolo, G Rong, SS Rong, F Rosini, Ch Rosner, MQ Ruan, WR Ruangyoo, N Salone, A Sarantsev, Y Schelhaas, M Schernau, K Schoenning, M Scodeggio, W Shan, XY Shan, ZJ Shang, JF Shangguan, LG Shao, M Shao, CP Shen, HF Shen, WH Shen, XY Shen, BA Shi, Ch Y Shi, H Shi, JL Shi, JY Shi, MH Shi, S Shi, SY Shi, X Shi, HL Song, JJ Song, MH Song, TZ Song, WM Song, YX Song, Zirong Song, S Sosio, S Spataro, S Stansilaus, F Stieler, M Stolte, SS Su, GB Sun, GX Sun, H Sun, HK Sun, JF Sun, K Sun, L Sun, R Sun, SS Sun, T Sun, WY Sun, YC Sun, YH Sun, YJ Sun, YZ Sun, ZQ Sun, ZT Sun, H Tabaharizato, NT Tagsinsit, CJ Tang, GY Tang, J Tang, JJ Tang, LF Tang, YA Tang, ZH Tang, LY Tao, M Tat, JX Teng, JY Tian, WH Tian, Y Tian, ZF Tian, K Yu Todyshev, I Uman, E van der Smagt, B Wang, Bin Wang, Bo Wang, C Wang, Chao Wang, Cong Wang, DY Wang, FK Wang, HJ Wang, HR Wang, J Wang, JJ Wang, JP Wang, K Wang, LL Wang, LW Wang, M Wang, Mi Wang, NY Wang, P Wang, S Wang, Shun Wang, T Wang, W Wang, WP Wang, XF Wang, XL Wang, XN Wang, Xin Wang, Y Wang, YD Wang, YF Wang, YH Wang, YJ Wang, YL Wang, YN Wang, Yanning Wang, Yaqian Wang, Yi Wang, Yuan Wang, Z Wang, ZL Wang, ZQ Wang, ZY Wang, Zhi Wang, Ziyi Wang, D Wei, DH Wei, DJ Wei, HR Wei, F Weidner, HR Wen, SP Wen, U Wiedner, G Wilkinson, JF Wu, LH Wu, LJ Wu, Lianjie Wu, SG Wu, SM Wu, XW Wu, Z Wu, HL Xia, L Xia, BH Xiang, D Xiao, GY Xiao, H Xiao, YL Xiao, ZJ Xiao, C Xie, KJ Xie, Y Xie, YG Xie, YH Xie, ZP Xie, TY Xing, DB Xiong, GF Xu, HY Xu, QJ Xu, QN Xu, TD Xu, XP Xu, Y Xu, YC Xu, ZS Xu, F Yan, L Yan, WB Yan, WC Yan, WH Yan, WP Yan, XQ Yan, YY Yan, HJ Yang, HL Yang, HX Yang, JH Yang, RJ Yang, XY Yang, Y Yang, YG Yang, YH Yang, YM Yang, YQ Yang, YZ Yang, Youhua Yang, ZY Yang, WJ Yao, ZP Yao, M Ye, MH Ye, ZJ Ye, K Yi, Junhao Yin, Qiqin Yin, ZY You, BX Yu, CX Yu, G Yu, JS Yu, LW Yu, T Yu, XD Yu, YC Yu, Yongchao Yu, CZ Yuan, H Yuan, J Yuan, Jie Yuan, L Yuan, MK Yuan, SH Yuan, Y Yuan, CX Yue, Ying Yue, AA Zafar, FR Zeng, SH Zeng, X Zeng, YJ Zeng, Yujie Zeng, YC Zhai, YH Zhan, BL Zhang, BX Zhang, DH Zhang, GY Zhang, Gengyuan Zhang, H Zhang, HC Zhang, HH Zhang, HL Zhang, HQ Zhang, HR Zhang, HY Zhang, Han Zhang, J Zhang, JJ Zhang, JL Zhang, JQ Zhang, JS Zhang, JW Zhang, JX Zhang, JY Zhang, JZ Zhang, Jianyu Zhang, Jin Zhang, Jiyuan Zhang, LM Zhang, Lei Zhang, N Zhang, P Zhang, Q Zhang, QY Zhang, QZ Zhang, RY Zhang, SH Zhang, SN Zhang, Shulei Zhang, XM Zhang, XY Zhang, YT Zhang, YH Zhang, YP Zhang, Yao Zhang, Yu Zhang, Yu Zhang, Z Zhang, ZD Zhang, ZH Zhang, ZL Zhang, ZX Zhang, ZY Zhang, Zh Zh Zhang, Zhilong Zhang, Ziyang Zhang, Ziyu Zhang, G Zhao, J-P Zhao, JY Zhao, JZ Zhao, L Zhao, Lei Zhao, MG Zhao, RP Zhao, SJ Zhao, YB Zhao, YL Zhao, YP Zhao, YX Zhao, ZG Zhao, A Zhemchugov, B Zheng, BM Zheng, JP Zheng, WJ Zheng, WQ Zheng, XR Zheng, YH Zheng, B Zhong, C Zhong, X Zhong, H Zhou, JQ Zhou, S Zhou, X Zhou, XK Zhou, XR Zhou, XY Zhou, YX Zhou, YZ Zhou, AN Zhu, J Zhu, K Zhu, KJ Zhu, KS Zhu, LX Zhu, Lin Zhu, SH Zhu, TJ Zhu, WD Zhu, WJ Zhu, WZ Zhu, YC Zhu, ZA Zhu, XY Zhuang, M Zhuge, JH Zou, J Zu

Measurement of the W-boson production cross sections in pp collisions at s=13 TeV in the forward region

Physical Review D American Physical Society (APS) 114:5 (2026) 052003

Authors:

R Aaij, M Abdelfatah, ASW Abdelmotteleb, C Abellan Beteta, F Abudinén, T Ackernley, AA Adefisoye, B Adeva, M Adinolfi, P Adlarson, C Agapopoulou, CA Aidala, Z Ajaltouni, S Akar, K Akiba, P Albicocco, J Albrecht, R Aleksiejunas, F Alessio, P Alvarez Cartelle, R Amalric, S Amato, JL Amey, Y Amhis, L An, L Anderlini, M Andersson, P Andreola, M Andreotti, S Andres Estrada, A Anelli, D Ao, C Arata, F Archilli, Z Areg, M Argenton, S Arguedas Cuendis, L Arnone, M Artuso, E Aslanides, R Ataíde Da Silva, M Atzeni, B Audurier, JA Authier, D Bacher, I Bachiller Perea, S Bachmann, M Bachmayer, JJ Back, ZB Bai, P Baladron Rodriguez, V Balagura, A Balboni, W Baldini, Z Baldwin, L Balzani, H Bao, J Baptista de Souza Leite, C Barbero Pretel, M Barbetti, IR Barbosa, RJ Barlow, M Barnyakov, S Barsuk, W Barter, J Bartz, S Bashir, B Batsukh, PB Battista, A Bavarchee, A Bay, A Beck, M Becker, F Bedeschi, IB Bediaga, NA Behling, S Belin, A Bellavista, I Belov, I Belyaev, G Benane, G Bencivenni, E Ben-Haim, R Bernet, A Bertolin, F Betti, J Bex, O Bezshyyko, S Bhattacharya, MS Bieker, NV Biesuz, A Biolchini, M Birch, FCR Bishop, A Bitadze, A Bizzeti, T Blake, F Blanc, JE Blank, S Blusk, JA Boelhauve, O Boente Garcia, T Boettcher, A Bohare, C Bolognani, R Bolzonella, RB Bonacci, A Bordelius, F Borgato, S Borghi, M Borsato, JT Borsuk, E Bottalico, SA Bouchiba, M Bovill, TJV Bowcock, A Boyer, C Bozzi, JD Brandenburg, A Brea Rodriguez, N Breer, C Breitfeld, J Brodzicka, J Brown, D Brundu, E Buchanan, M Burgos Marcos, C Burr, C Buti, JS Butter, J Buytaert, W Byczynski, S Cadeddu, H Cai, Y Cai, A Caillet, R Calabrese, L Calefice, M Calvi, M Calvo Gomez, P Camargo Magalhaes, JI Cambon Bouzas, P Campana, AC Campos, AF Campoverde Quezada, Y Cao, S Capelli, M Caporale, L Capriotti, R Caravaca-Mora, A Carbone, L Carcedo Salgado, R Cardinale, A Cardini, P Carniti, L Carus, A Casais Vidal, R Caspary, G Casse, M Cattaneo, G Cavallero, V Cavallini, S Celani, I Celestino, S Cesare, AJ Chadwick, I Chahrour, M Charles, Ph Charpentier, E Chatzianagnostou, R Cheaib, M Chefdeville, C Chen, J Chen, S Chen, Z Chen, A Chen Hu, M Cherif, A Chernov, S Chernyshenko, X Chiotopoulos, G Chizhik, V Chobanova, M Chrzaszcz, V Chulikov, P Ciambrone, X Cid Vidal, G Ciezarek, P Cifra, PEL Clarke, M Clemencic, HV Cliff, J Closier, C Cocha Toapaxi, V Coco, J Cogan, E Cogneras, L Cojocariu, S Collaviti, P Collins, T Colombo, M Colonna, A Comerma-Montells, L Congedo, J Connaughton, A Contu, N Cooke, G Cordova, C Coronel, I Corredoira, A Correia, G Corti, GC Costantino, J Cottee Meldrum, B Couturier, DC Craik, N Crepet, M Cruz Torres, M Cubero Campos, E Curras Rivera, R Currie, CL Da Silva, X Dai, E Dall’Occo, J Dalseno, C D’Ambrosio, J Daniel, G Darze, A Davidson, JE Davies, O De Aguiar Francisco, C De Angelis, F De Benedetti, J de Boer, K De Bruyn, S De Capua, M De Cian, U De Freitas Carneiro Da Graca, E De Lucia, JM De Miranda, L De Paula, M De Serio, P De Simone, F De Vellis, JA de Vries, F Debernardis, D Decamp, S Dekkers, L Del Buono, B Delaney, J Deng, V Denysenko, O Deschamps, F Dettori, B Dey, P Di Nezza, S Ding, Y Ding, L Dittmann, AD Docheva, A Doheny, C Dong, F Dordei, AC dos Reis, AD Dowling, L Dreyfus, W Duan, P Duda, L Dufour, V Duk, P Durante, MM Duras, JM Durham, OD Durmus, A Dziurda, S Easo, E Eckstein, U Egede, S Eisenhardt, E Ejopu, L Eklund, M Elashri, D Elizondo Blanco, J Ellbracht, S Ely, A Ene, J Eschle, T Evans, F Fabiano, S Faghih, LN Falcao, B Fang, R Fantechi, L Fantini, M Faria, K Farmer, F Fassin, D Fazzini, L Felkowski, C Feng, M Feng, A Fernandez Casani, M Fernandez Gomez, AD Fernez, F Ferrari, F Ferreira Rodrigues, M Ferrillo, M Ferro-Luzzi, RA Fini, M Fiorini, M Firlej, KL Fischer, DS Fitzgerald, C Fitzpatrick, T Fiutowski, F Fleuret, A Fomin, M Fontana, LA Foreman, R Forty, D Foulds-Holt, V Franco Lima, M Franco Sevilla, M Frank, E Franzoso, G Frau, C Frei, DA Friday, J Fu, Q Führing, T Fulghesu, G Galati, MD Galati, A Gallas Torreira, D Galli, S Gambetta, M Gandelman, P Gandini, B Ganie, H Gao, R Gao, TQ Gao, Y Gao, Y Gao, Y Gao, LM Garcia Martin, P Garcia Moreno, J García Pardiñas, P Gardner, L Garrido, C Gaspar, A Gavrikov, LL Gerken, E Gersabeck, M Gersabeck, T Gershon, S Ghizzo, Z Ghorbanimoghaddam, FI Giasemis, V Gibson, HK Giemza, AL Gilman, M Giovannetti, A Gioventù, L Girardey, MA Giza, FC Glaser, VV Gligorov, C Göbel, L Golinka-Bezshyyko, E Golobardes, A Golutvin, S Gomez Fernandez, W Gomulka, F Goncalves Abrantes, I Gonçales Vaz, M Goncerz, G Gong, JA Gooding, C Gotti, E Govorkova, JP Grabowski, LA Granado Cardoso, E Graugés, E Graverini, L Grazette, G Graziani, AT Grecu, NA Grieser, L Grillo, C Gu, M Guarise, L Guerry, A-K Guseinov, Y Guz, T Gys, K Habermann, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, S Haken, G Hallett, PM Hamilton, Q Han, X Han, S Hansmann-Menzemer, N Harnew, TJ Harris, M Hartmann, S Hashmi, J He, N Heatley, A Hedes, F Hemmer, C Henderson, R Henderson, RDL Henderson, AM Hennequin, K Hennessy, J Herd, P Herrero Gascon, J Heuel, A Heyn, A Hicheur, G Hijano Mendizabal, J Horswill, R Hou, Y Hou, DC Houston, N Howarth, W Hu, X Hu, W Hulsbergen, RJ Hunter, D Hutchcroft, M Idzik, P Ilten, A Iohner, H Jage, SJ Jaimes Elles, S Jakobsen, T Jakoubek, E Jans, A Jawahery, C Jayaweera, A Jelavic, V Jevtic, Z Jia, E Jiang, X Jiang, Y Jiang, YJ Jiang, E Jimenez Moya, N Jindal, M John, A John Rubesh Rajan, D Johnson, CR Jones, S Joshi, B Jost, J Juan Castella, N Jurik, I Juszczak, K Kalecinska, D Kaminaris, S Kandybei, M Kane, Y Kang, C Kar, M Karacson, A Kauniskangas, JW Kautz, MK Kazanecki, F Keizer, M Kenzie, T Ketel, B Khanji, S Kholodenko, G Khreich, F Kiraz, T Kirn, VS Kirsebom, S Klaver, N Kleijne, A Kleimenova, DK Klekots, K Klimaszewski, MR Kmiec, T Knospe, R Kolb, S Koliiev, L Kolk, A Konoplyannikov, P Kopciewicz, P Koppenburg, A Korchin, I Kostiuk, O Kot, S Kotriakhova, E Kowalczyk, O Kravcov, M Kreps, W Krupa, W Krzemien, O Kshyvanskyi, S Kubis, M Kucharczyk, A Kupsc, V Kushnir, B Kutsenko, J Kvapil, I Kyryllin, D Lacarrere, P Laguarta Gonzalez, A Lai, A Lampis, D Lancierini, C Landesa Gomez, JJ Lane, G Lanfranchi, C Langenbruch, J Langer, T Latham, F Lazzari, C Lazzeroni, R Le Gac, H Lee, R Lefèvre, M Lehuraux, E Lemos Cid, O Leroy, T Lesiak, ED Lesser, B Leverington, A Li, C Li, C Li, H Li, J Li, K Li, L Li, P Li, P-R Li, Q Li, T Li, T Li, Y Li, Y Li, Y Li, Z Lian, Q Liang, X Liang, Z Liang, S Libralon, A Lightbody, C Lin, T Lin, R Lindner, H Linton, R Litvinov, D Liu, FL Liu, G Liu, K Liu, S Liu, W Liu, Y Liu, Y Liu, YL Liu, G Loachamin Ordonez, I Lobo, A Lobo Salvia, A Loi, T Long, FCL Lopes, JH Lopes, A Lopez Huertas, C Lopez Iribarnegaray, Q Lu, C Lucarelli, D Lucchesi, M Lucio Martinez, Y Luo, A Lupato, M Lupberger, E Luppi, K Lynch, S Lyu, X-R Lyu, H Ma, S Maccolini, F Machefert, F Maciuc, B Mack, I Mackay, LM Mackey, LR Madhan Mohan, MJ Madurai, D Magdalinski, JJ Malczewski, S Malde, L Malentacca, G Manca, G Mancinelli, C Mancuso, R Manera Escalero, A Mangalasseri, FM Manganella, D Manuzzi, D Marangotto, JF Marchand, R Marchevski, U Marconi, E Mariani, S Mariani, C Marin Benito, J Marks, AM Marshall, L Martel, G Martelli, G Martellotti, L Martinazzoli, M Martinelli, D Martinez Gomez, D Martinez Santos, F Martinez Vidal, A Martorell I Granollers, A Massafferri, R Matev, A Mathad, C Matteuzzi, KR Mattioli, A Mauri, E Maurice, J Mauricio, P Mayencourt, J Mazorra de Cos, M Mazurek, D Mazzanti Tarancon, M McCann, NT McHugh, A McNab, R McNulty, B Meadows, D Melnychuk, D Mendoza Granada, P Menendez Valdes Perez, FM Meng, M Merk, A Merli, L Meyer Garcia, D Miao, H Miao, M Mikhasenko, DA Milanes, A Minotti, E Minucci, B Mitreska, DS Mitzel, R Mocanu, A Modak, L Moeser, RD Moise, EF Molina Cardenas, T Mombächer, M Monk, T Monnard, S Monteil, A Morcillo Gomez, G Morello, MJ Morello, MP Morgenthaler, A Moro, J Moron, W Morren, AB Morris, AG Morris, R Mountain, Z Mu, E Muhammad, F Muheim, M Mulder, K Müller, F Muñoz-Rojas, V Mytrochenko, P Naik, T Nakada, R Nandakumar, G Napoletano, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, J Nicolini, D Nicotra, EM Niel, L Nisi, Q Niu, BK Njoki, P Nogarolli, P Nogga, C Normand, J Novoa Fernandez, G Nowak, C Nunez, HN Nur, A Oblakowska-Mucha, T Oeser, O Okhrimenko, R Oldeman, F Oliva, E Olivart Pino, M Olocco, RH O’Neil, JS Ordonez Soto, D Osthues, JM Otalora Goicochea, P Owen, A Oyanguren, O Ozcelik, F Paciolla, A Padee, KO Padeken, B Pagare, T Pajero, A Palano, L Palini, M Palutan, C Pan, X Pan, S Panebianco, S Paniskaki, L Paolucci, A Papanestis, M Pappagallo, LL Pappalardo, C Pappenheimer, C Parkes, D Parmar, G Passaleva, D Passaro, A Pastore, M Patel, J Patoc, C Patrignani, A Paul, CJ Pawley, A Pellegrino, J Peng, X Peng, M Pepe Altarelli, S Perazzini, H Pereira Da Costa, M Pereira Martinez, A Pereiro Castro, C Perez, P Perret, A Perrevoort, A Perro, MJ Peters, K Petridis, A Petrolini, S Pezzulo, JP Pfaller, H Pham, L Pica, M Piccini, L Piccolo, B Pietrzyk, RN Pilato, D Pinci, F Pisani, M Pizzichemi, VM Placinta, M Plo Casasus, T Poeschl, F Polci, M Poli Lener, A Poluektov, I Polyakov, E Polycarpo, S Ponce, D Popov, K Popp, K Prasanth, C Prouve, D Provenzano, V Pugatch, A Puicercus Gomez, G Punzi, JR Pybus, Q Qian, W Qian, N Qin, R Quagliani, RI Rabadan Trejo, R Racz, JH Rademacker, M Rama, M Ramírez García, V Ramos De Oliveira, M Ramos Pernas, MS Rangel, G Raven, M Rebollo De Miguel, F Redi, J Reich, F Reiss, Z Ren, PK Resmi, M Ribalda Galvez, R Ribatti, G Ricart, D Riccardi, S Ricciardi, K Richardson, M Richardson-Slipper, F Riehn, K Rinnert, P Robbe, G Robertson, E Rodrigues, A Rodriguez Alvarez, E Rodriguez Fernandez, JA Rodriguez Lopez, E Rodriguez Rodriguez, J Roensch, A Rogovskiy, DL Rolf, P Roloff, V Romanovskiy, A Romero Vidal, G Romolini, F Ronchetti, T Rong, M Rotondo, MS Rudolph, M Ruiz Diaz, RA Ruiz Fernandez, J Ruiz Vidal, JJ Saavedra-Arias, JJ Saborido Silva, SER Sacha Emile R., D Sahoo, N Sahoo, B Saitta, M Salomoni, I Sanderswood, R Santacesaria, C Santamarina Rios, M Santimaria, L Santoro, E Santovetti, A Saputi, A Sarnatskiy, G Sarpis, M Sarpis, C Satriano, A Satta, M Saur, H Sazak, F Sborzacchi, A Scarabotto, S Schael, S Scherl, M Schiller, H Schindler, M Schmelling, B Schmidt, N Schmidt, S Schmitt, H Schmitz, O Schneider, A Schopper, N Schulte, MH Schune, G Schwering, B Sciascia, A Sciuccati, G Scriven, I Segal, S Sellam, T Senger, M Senghi Soares, A Sergi, N Serra, L Sestini, B Sevilla Sanjuan, Y Shang, DM Shangase, RS Sharma, L Shchutska, T Shears, J Shen, Z Shen, S Sheng, B Shi, J Shi, Q Shi, WS Shi, E Shmanin, R Silva Coutinho, G Simi, S Simone, M Singha, I Siral, N Skidmore, T Skwarnicki, MW Slater, E Smith, M Smith, L Soares Lavra, MD Sokoloff, FJP Soler, A Solomin, K Solovieva, NS Sommerfeld, R Song, Y Song, Y Song, YS Song, FL Souza De Almeida, B Souza De Paula, KM Sowa, E Spadaro Norella, E Spedicato, JG Speer, P Spradlin, F Stagni, M Stahl, S Stahl, S Stanislaus, M Stefaniak, O Steinkamp, Y Su, F Suljik, J Sun, J Sun, L Sun, D Sundfeld, W Sutcliffe, P Svihra, V Svintozelskyi, K Swientek, F Swystun, A Szabelski, T Szumlak, Y Tan, Y Tang, YT Tang, MD Tat, JA Teijeiro Jimenez, F Terzuoli, F Teubert, E Thomas, DJD Thompson, AR Thomson-Strong, H Tilquin, V Tisserand, S T’Jampens, M Tobin, TT Todorov, L Tomassetti, G Tonani, X Tong, T Tork, L Toscano, DY Tou, C Trippl, G Tuci, N Tuning, LH Uecker, A Ukleja, DJ Unverzagt, A Upadhyay, B Urbach, A Usachov, U Uwer, V Vagnoni, A Vaitkevicius, V Valcarce Cadenas, G Valenti, N Valls Canudas, J van Eldik, H Van Hecke, E van Herwijnen, CB Van Hulse, R Van Laak, M van Veghel, G Vasquez, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, J Velilla Serna, JJ Velthuis, M Veltri, A Venkateswaran, M Verdoglia, M Vesterinen, W Vetens, D Vico Benet, P Vidrier Villalba, M Vieites Diaz, X Vilasis-Cardona, E Vilella Figueras, A Villa, P Vincent, B Vivacqua, FC Volle, D vom Bruch, K Vos, C Vrahas, J Wagner, J Walsh, N Walter, EJ Walton, G Wan, A Wang, B Wang, C Wang, G Wang, H Wang, J Wang, J Wang, J Wang, J Wang, M Wang, NW Wang, R Wang, X Wang, X Wang, XW Wang, Y Wang, Y Wang, YH Wang, Z Wang, Z Wang, JA Ward, M Waterlaat, NK Watson, D Websdale, Y Wei, Z Weida, J Wendel, BDC Westhenry, C White, M Whitehead, E Whiter, AR Wiederhold, D Wiedner, MA Wiegertjes, C Wild, G Wilkinson, MK Wilkinson, M Williams, MJ Williams, MRJ Williams, R Williams, S Williams, Z Williams, FF Wilson, M Winn, W Wislicki, M Witek, L Witola, T Wolf, E Wood, G Wormser, SA Wotton, H Wu, J Wu, X Wu, Y Wu, Z Wu, K Wyllie, S Xian, Z Xiang, Y Xie, TX Xing, A Xu, L Xu, M Xu, R Xu, Z Xu, Z Xu, Z Xu, S Yadav, K Yang, X Yang, Y Yang, Y Yang, Z Yang, Z Yang, H Yeung, H Yin, X Yin, CY Yu, J Yu, X Yuan, Y Yuan, JA Zamora Saa, M Zavertyaev, M Zdybal, F Zenesini, C Zeng, M Zeng, SH Zeng, C Zhang, D Zhang, J Zhang, L Zhang, R Zhang, S Zhang, SL Zhang, Y Zhang, Z Zhang, Y Zhao, A Zhelezov, SZ Zheng, XZ Zheng, Y Zheng, T Zhou, X Zhou, V Zhovkovska, LZ Zhu, X Zhu, X Zhu, Y Zhu, V Zhukov, J Zhuo, D Zuliani, G Zunica

Abstract:

A precision measurement of the W -boson production cross section is performed using the W → μ ν decay channel, based on a sample of proton-proton collision data collected by the LHCb experiment at s = 13 TeV and corresponding to an integrated luminosity of 5.1 fb − 1 . The cross section is measured for muons with transverse momentum between 25 and 55 GeV and pseudorapidity between 2.0 and 4.5. The total production cross sections of W bosons are measured to be σ W + → μ + ν = 1754.2 ± 1.5 ± 11.8 ± 35.1 pb σ W − → μ − ν ¯ = 1178.1 ± 1.3 ± 9.7 ± 23.6 pb where uncertainties are statistical, systematic, and due to the luminosity determination, respectively. Differential distributions d σ W ± → μ ± ν / d η μ ± are also presented. The total and differential cross sections are in good agreement with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. This measurement is significantly more precise than previous results in this kinematic regime.