Observation of $J/Ï$ pair production in pp collisions at $\sqrt{s}=7 TeV$
ArXiv 1109.0963 (2011)
Authors:
LHCb Collaboration, R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, Y Amhis, J Anderson, RB Appleby, O Aquines Gutierrez, F Archilli, L Arrabito, A Artamonov, M Artuso, E Aslanides, G Auriemma, S Bachmann, JJ Back, DS Bailey, V Balagura, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, A Bates, C Bauer, Th Bauer, A Bay, I Bediaga, K Belous, I Belyaev, E Ben-Haim, M Benayoun, G Bencivenni, S Benson, J Benton, R Bernet, M-O Bettler, M van Beuzekom, A Bien, S Bifani, A Bizzeti, PM BjĂžrnstad, T Blake, F Blanc, C Blanks, J Blouw, S Blusk, A Bobrov, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, TJV Bowcock, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, S Brisbane, M Britsch, T Britton, NH Brook, H Brown, A BĂŒchler-Germann, I Burducea, A Bursche, J Buytaert, S Cadeddu, JM Caicedo Carvajal, O Callot, M Calvi, M Calvo Gomez, A Camboni, P Campana, A Carbone, G Carboni, R Cardinale, A Cardini, L Carson, K Carvalho Akiba, G Casse, M Cattaneo, M Charles, Ph Charpentier, N Chiapolini, K Ciba, X Cid Vidal, G Ciezarek, PEL Clarke, M Clemencic, HV Cliff, J Closier, C Coca, V Coco, J Cogan, P Collins, F Constantin, G Conti, A Contu, A Cook, M Coombes, G Corti, GA Cowan, R Currie, B D'Almagne, C D'Ambrosio, P David, I De Bonis, S De Capua, M De Cian, F De Lorenzi, JM De Miranda, L De Paula, P De Simone, D Decamp, M Deckenhoff, H Degaudenzi, M Deissenroth, L Del Buono, C Deplano, O Deschamps, F Dettori, J Dickens, H Dijkstra, P Diniz Batista, S Donleavy, A Dosil SuĂĄrez, D Dossett, A Dovbnya, F Dupertuis, R Dzhelyadin, C Eames, S Easo, U Egede, V Egorychev, S Eidelman, D van Eijk, F Eisele, S Eisenhardt, R Ekelhof, L Eklund, Ch Elsasser, DG d'Enterria, D Esperante Pereira, L EstĂšve, A Falabella, E Fanchini, C FĂ€rber, G Fardell, C Farinelli, S Farry, V Fave, V Fernandez Albor, M Ferro-Luzzi, S Filippov, C Fitzpatrick, M Fontana, F Fontanelli, R Forty, M Frank, C Frei, M Frosini, S Furcas, A Gallas Torreira, D Galli, M Gandelman, P Gandini, Y Gao, J-C Garnier, J Garofoli, J Garra Tico, L Garrido, C Gaspar, N Gauvin, M Gersabeck, T Gershon, Ph Ghez, V Gibson, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, H Gordon, M Grabalosa GĂĄndara, R Graciani Diaz, LA Granado Cardoso, E GraugĂ©s, G Graziani, A Grecu, S Gregson, B Gui, E Gushchin, Yu Guz, T Gys, G Haefeli, C Haen, SC Haines, T Hampson, S Hansmann-Menzemer, R Harji, N Harnew, J Harrison, PF Harrison, J He, V Heijne, K Hennessy, P Henrard, JA Hernando Morata, E van Herwijnen, E Hicks, W Hofmann, K Holubyev, P Hopchev, W Hulsbergen, P Hunt, T Huse, RS Huston, D Hutchcroft, D Hynds, V Iakovenko, P Ilten, J Imong, R Jacobsson, A Jaeger, M Jahjah Hussein, E Jans, F Jansen, P Jaton, B Jean-Marie, F Jing, M John, D Johnson, CR Jones, B Jost, S Kandybei, M Karacson, TM Karbach, J Keaveney, U Kerzel, T Ketel, A Keune, B Khanji, YM Kim, M Knecht, S Koblitz, P Koppenburg, A Kozlinskiy, L Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, K Kruzelecki, M Kucharczyk, S Kukulak, R Kumar, T Kvaratskheliya, VN La Thi, D Lacarrere, G Lafferty, A Lai, D Lambert, RW Lambert, E Lanciotti, G Lanfranchi, C Langenbruch, T Latham, R Le Gac, J van Leerdam, J-P Lees, R LefĂšvre, A Leflat, J Lefrançois, O Leroy, T Lesiak, L Li, L Li Gioi, M Lieng, M Liles, R Lindner, C Linn, B Liu, G Liu, JH Lopes, E Lopez Asamar, N Lopez-March, J Luisier, F Machefert, IV Machikhiliyan, F Maciuc, O Maev, J Magnin, S Malde, RMD Mamunur, G Manca, G Mancinelli, N Mangiafave, U Marconi, R MĂ€rki, J Marks, G Martellotti, A Martens, L Martin, A MartĂn SĂĄnchez, D Martinez Santos, A Massafferri, Z Mathe, C Matteuzzi, M Matveev, E Maurice, B Maynard, A Mazurov, G McGregor, R McNulty, C Mclean, M Meissner, M Merk, J Merkel, R Messi, S Miglioranzi, DA Milanes, M-N Minard, S Monteil, D Moran, P Morawski, R Mountain, I Mous, F Muheim, K MĂŒller, R Muresan, B Muryn, M Musy, J Mylroie-Smith, P Naik, T Nakada, R Nandakumar, J Nardulli, I Nasteva, M Nedos, M Needham, N Neufeld, C Nguyen-Mau, M Nicol, S Nies, V Niess, N Nikitin, A Novoselov, A Oblakowska-Mucha, V Obraztsov, S Oggero, S Ogilvy, O Okhrimenko, R Oldeman, M Orlandea, JM Otalora Goicochea, P Owen, B Pal, J Palacios, M Palutan, J Panman, A Papanestis, M Pappagallo, C Parkes, CJ Parkinson, G Passaleva, GD Patel, M Patel, SK Paterson, GN Patrick, C Patrignani, C Pavel-Nicorescu, A Pazos Alvarez, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, DL Perego, E Perez Trigo, A PĂ©rez-Calero Yzquierdo, P Perret, M Perrin-Terrin, G Pessina, A Petrella, A Petrolini, B Pie Valls, B Pietrzyk, T Pilar, D Pinci, R Plackett, S Playfer, M Plo Casasus, G Polok, A Poluektov, E Polycarpo, D Popov, B Popovici, C Potterat, A Powell, T du Pree, J Prisciandaro, V Pugatch, A Puig Navarro, W Qian, JH Rademacker, B Rakotomiaramanana, MS Rangel, I Raniuk, G Raven, S Redford, MM Reid, AC dos Reis, S Ricciardi, K Rinnert, DA Roa Romero, P Robbe, E Rodrigues, F Rodrigues, P Rodriguez Perez, GJ Rogers, S Roiser, V Romanovsky, J Rouvinet, T Ruf, H Ruiz, G Sabatino, JJ Saborido Silva, N Sagidova, P Sail, B Saitta, C Salzmann, M Sannino, R Santacesaria, R Santinelli, E Santovetti, M Sapunov, A Sarti, C Satriano, A Satta, M Savrie, D Savrina, P Schaack, M Schiller, S Schleich, M Schmelling, B Schmidt, O Schneider, A Schopper, M-H Schune, R Schwemmer, A Sciubba, M Seco, A Semennikov, K Senderowska, I Sepp, N Serra, J Serrano, P Seyfert, B Shao, M Shapkin, I Shapoval, P Shatalov, Y Shcheglov, T Shears, L Shekhtman, O Shevchenko, V Shevchenko, A Shires, R Silva Coutinho, HP Skottowe, T Skwarnicki, AC Smith, NA Smith, K Sobczak, FJP Soler, A Solomin, F Soomro, B Souza De Paula, B Spaan, A Sparkes, P Spradlin, F Stagni, S Stahl, O Steinkamp, S Stoica, S Stone, B Storaci, M Straticiuc, U Straumann, N Styles, VK Subbiah, S Swientek, M Szczekowski, P Szczypka, T Szumlak, S T'Jampens, E Teodorescu, F Teubert, C Thomas, E Thomas, J van Tilburg, V Tisserand, M Tobin, S Topp-Joergensen, MT Tran, A Tsaregorodtsev, N Tuning, A Ukleja, P Urquijo, U Uwer, V Vagnoni, G Valenti, R Vazquez Gomez, P Vazquez Regueiro, S Vecchi, JJ Velthuis, M Veltri, K Vervink, B Viaud, I Videau, X Vilasis-Cardona, J Visniakov, A Vollhardt, D Voong, A Vorobyev, H Voss, K Wacker, S Wandernoth, J Wang, DR Ward, AD Webber, D Websdale, M Whitehead, D Wiedner, L Wiggers, G Wilkinson, MP Williams, M Williams, FF Wilson, J Wishahi, M Witek, W Witzeling, SA Wotton, K Wyllie, Y Xie, F Xing, Z Yang, R Young, O Yushchenko, M Zavertyaev, L Zhang, WC Zhang, Y Zhang, A Zhelezov, L Zhong, E Zverev, A Zvyagin
Abstract:
The production of $J/Ï$ pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of $37.5 pb^{-1}$ collected with the LHCb detector. The production cross-section for pairs with both \jpsi in the rapidity range $2
Measurement of b hadron lifetimes in exclusive decays containing a J/Ï in pp collisions at âs=1.96 TeV.
Phys Rev Lett 106:12 (2011) 121804
Authors:
T Aaltonen, B Ălvarez GonzĂĄlez, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, A Apresyan, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, G Bauer, F Bedeschi, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, I Bizjak, KR Bland, C Blocker, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, B Brau, L Brigliadori, A Brisuda, C Bromberg, E Brucken, M Bucciantonio, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, S Cabrera, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, A Canepa, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, JP Chou, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, A Clark, D Clark, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli, C Cuenca Almenar, J Cuevas, R Culbertson, D Dagenhart, N d'Ascenzo, M Datta, P de Barbaro, S De Cecco, G De Lorenzo, M Dell'Orso, C Deluca, L Demortier, J Deng, M Deninno, F Devoto, M d'Errico, A Di Canto, B Di Ruzza, JR Dittmann, M D'Onofrio, S Donati, P Dong, T Dorigo, K Ebina, A Elagin, A Eppig, R Erbacher, D Errede, S Errede, N Ershaidat, R Eusebi, HC Fang, S Farrington, M Feindt, JP Fernandez, C Ferrazza, R Field, G Flanagan, R Forrest, MJ Frank, M Franklin, JC Freeman, I Furic, M Gallinaro, J Galyardt, JE Garcia, AF Garfinkel, P Garosi, H Gerberich, E Gerchtein, S Giagu, V Giakoumopoulou, P Giannetti, K Gibson, CM Ginsburg, N Giokaris, P Giromini, M Giunta, G Giurgiu, V Glagolev, D Glenzinski, M Gold, D Goldin, N Goldschmidt, A Golossanov, G Gomez, G Gomez-Ceballos, M Goncharov, O GonzĂĄlez, I Gorelov, AT Goshaw, K Goulianos, A Gresele, S Grinstein, C Grosso-Pilcher, RC Group, J Guimaraes da Costa, Z Gunay-Unalan, C Haber, SR Hahn, E Halkiadakis, A Hamaguchi, JY Han, F Happacher, K Hara, D Hare, M Hare, RF Harr, K Hatakeyama, C Hays, M Heck, J Heinrich, M Herndon, S Hewamanage, D Hidas, A Hocker, W Hopkins, D Horn, S Hou, RE Hughes, M Hurwitz, U Husemann, N Hussain, M Hussein, J Huston, G Introzzi, M Iori, A Ivanov, E James, D Jang, B Jayatilaka, EJ Jeon, MK Jha, S Jindariani, W Johnson, M Jones, KK Joo, SY Jun, TR Junk, T Kamon, PE Karchin, Y Kato, W Ketchum, J Keung, V Khotilovich, B Kilminster, DH Kim, HS Kim, HW Kim, JE Kim, MJ Kim, SB Kim, SH Kim, YK Kim, N Kimura, S Klimenko, K Kondo, DJ Kong, J Konigsberg, A Korytov, AV Kotwal, M Kreps, J Kroll, D Krop, N Krumnack, M Kruse, V Krutelyov, T Kuhr, M Kurata, S Kwang, AT Laasanen, L Labarga, S Lami, S Lammel, M Lancaster, RL Lander, K Lannon, A Lath, G Latino, I Lazzizzera, T LeCompte, E Lee, HS Lee, JS Lee, SW Lee, S Leo, S Leone, JD Lewis, C-J Lin, J Linacre, M Lindgren, E Lipeles, A Lister, DO Litvintsev, C Liu, Q Liu, T Liu, S Lockwitz, NS Lockyer, A Loginov, D Lucchesi, J Lueck, P Lujan, P Lukens, G Lungu, J Lys, R Lysak, R Madrak, K Maeshima, K Makhoul, P Maksimovic, S Malde, S Malik, G Manca, A Manousakis-Katsikakis, F Margaroli, C Marino, M MartĂnez, R MartĂnez-BallarĂn, P Mastrandrea, M Mathis, ME Mattson, P Mazzanti, KS McFarland, P McIntyre, R McNulty, A Mehta, P Mehtala, A Menzione, C Mesropian, T Miao, D Mietlicki, A Mitra, H Miyake, S Moed, N Moggi, MN Mondragon, CS Moon, R Moore, MJ Morello, J Morlock, P Movilla Fernandez, A Mukherjee, Th Muller, P Murat, M Mussini, J Nachtman, Y Nagai, J Naganoma, I Nakano, A Napier, J Nett, C Neu, MS Neubauer, J Nielsen, L Nodulman, O Norniella, E Nurse, L Oakes, SH Oh, YD Oh, I Oksuzian, T Okusawa, R Orava, L Ortolan, S Pagan Griso, C Pagliarone, E Palencia, V Papadimitriou, AA Paramonov, J Patrick, G Pauletta, M Paulini, C Paus, DE Pellett, A Penzo, TJ Phillips, G Piacentino, E Pianori, J Pilot, K Pitts, C Plager, L Pondrom, K Potamianos, O Poukhov, F Prokoshin, A Pronko, F Ptohos, E Pueschel, G Punzi, J Pursley, A Rahaman, V Ramakrishnan, N Ranjan, I Redondo, P Renton, M Rescigno, F Rimondi, L Ristori, A Robson, T Rodrigo, T Rodriguez, E Rogers, S Rolli, R Roser, M Rossi, F Ruffini, A Ruiz, J Russ, V Rusu, A Safonov, WK Sakumoto, L Santi, L Sartori, K Sato, V Saveliev, A Savoy-Navarro, P Schlabach, A Schmidt, EE Schmidt, MP Schmidt, M Schmitt, T Schwarz, L Scodellaro, A Scribano, F Scuri, A Sedov, S Seidel, Y Seiya, A Semenov, F Sforza, A Sfyrla, SZ Shalhout, T Shears, PF Shepard, M Shimojima, S Shiraishi, M Shochet, I Shreyber, A Simonenko, P Sinervo, A Sissakian, K Sliwa, JR Smith, FD Snider, A Soha, S Somalwar, V Sorin, P Squillacioti, M Stanitzki, R St Denis, B Stelzer, O Stelzer-Chilton, D Stentz, J Strologas, GL Strycker, Y Sudo, A Sukhanov, I Suslov, K Takemasa, Y Takeuchi, J Tang, M Tecchio, PK Teng, J Thom, J Thome, GA Thompson, E Thomson, P Ttito-GuzmĂĄn, S Tkaczyk, D Toback, S Tokar, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, M Trovato, Y Tu, N Turini, F Ukegawa, S Uozumi, A Varganov, E Vataga, F VĂĄzquez, G Velev, C Vellidis, M Vidal, I Vila, R Vilar, M Vogel, G Volpi, P Wagner, RL Wagner, T Wakisaka, R Wallny, SM Wang, A Warburton, D Waters, M Weinberger, H Wenzel, WC Wester, B Whitehouse, D Whiteson, AB Wicklund, E Wicklund, S Wilbur, F Wick, HH Williams, JS Wilson, P Wilson, BL Winer, P Wittich, S Wolbers, H Wolfe, T Wright, X Wu, Z Wu, K Yamamoto, J Yamaoka, T Yang, UK Yang, YC Yang, W-M Yao, GP Yeh, K Yi, J Yoh, K Yorita, T Yoshida, GB Yu, I Yu, SS Yu, JC Yun, A Zanetti, Y Zeng, S Zucchelli, CDF Collaboration
Abstract:
We report on a measurement of b-hadron lifetimes in the fully reconstructed decay modes B(+)âJ/Ï°(+), Bâ°âJ/Ï°*(892)â°, Bâ°âJ/Ï°(s)â°, and Î(b)â°âJ/ÏÎâ° using data corresponding to an integrated luminosity of 4.3 fbâ»Âč, collected by the CDF II detector at the Fermilab Tevatron. The measured lifetimes are Ï(B(+))=[1.639±0.009(stat)±0.009(syst)] ps, Ï(Bâ°)=[1.507±0.010(stat)±0.008(syst)] ps, and Ï(Î(b)â°)=[1.537±0.045(stat)±0.014(syst)] ps. The lifetime ratios are Ï(B(+))/Ï(Bâ°)=[1.088±0.009(stat)±0.004(syst)] and Ï(Î(b)â°)/Ï(Bâ°)=[1.020±0.030(stat)±0.008(syst)]. These are the most precise determinations of these quantities from a single experiment.
