Search for Neutral MSSM Higgs Bosons Decaying to Tau Pairs in pp Collisions at sqrt(s)=7 TeV

ArXiv 1104.1619 (2011)

Search for heavy bottomlike quarks decaying to an electron or muon and jets in pp collisions at √s = 1.96  TeV.

Phys Rev Lett 106:14 (2011) 141803

Authors:

T Aaltonen, B Álvarez Gonzålez, 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, 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, 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, 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, M Dorigo, 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, Y Funakoshi, 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 Gonzålez, 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, M Kirby, S Klimenko, K Kondo, DJ Kong, J Konigsberg, AV Kotwal, M Kreps, J Kroll, D Krop, N Krumnack, M Kruse, V Krutelyov, T Kuhr, M Kurata, S Kwang, AT Laasanen, 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 Malik, G Manca, A Manousakis-Katsikakis, F Margaroli, C Marino, M Martínez, R Martínez-Ballarín, 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 Rubbo, F Ruffini, A Ruiz, J Russ, V Rusu, A Safonov, WK Sakumoto, Y Sakurai, 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 Stancari, 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-Guzmån, S Tkaczyk, D Toback, S Tokar, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, M Trovato, Y Tu, F Ukegawa, S Uozumi, A Varganov, F Våzquez, G Velev, C Vellidis, M Vidal, I Vila, R Vilar, J Vizån, M Vogel, G Volpi, P Wagner, RL Wagner, T Wakisaka, R Wallny, SM Wang, A Warburton, D Waters, M Weinberger, 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 the most sensitive direct search for pair production of fourth-generation bottomlike chiral quarks (b') each decaying promptly to tW. We search for an excess of events with an electron or muon, at least five jets (one identified as due to a b or c quark), and an imbalance of transverse momentum by using data from pp collisions collected by the CDF II detector at Fermilab with an integrated luminosity of 4.8  fb(-1). We observe events consistent with background expectation, calculate upper limits on the b' pair-production cross section (σ(bb')) â‰Č30  fb for m(b') > 375  GeV/c2), and exclude m(b') < 372  GeV/c2 at 95% confidence level assuming a 100% branching ratio of b' to tW.

Search for supersymmetry using final states with one lepton, jets, and missing transverse momentum with the ATLAS detector in √s=7 TeV pp collisions.

Phys Rev Lett 106:13 (2011) 131802

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, MS Alam, MA Alam, S Albrand, M Aleksa, IN Aleksandrov, M Aleppo, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G AmorĂłs, N Amram, C Anastopoulos, T Andeen, CF Anders, KJ Anderson, A Andreazza, V Andrei, M-L Andrieux, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Annovi, A Antonaki, M Antonelli, S Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, J-F Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, C Arnault, A Artamonov, G Artoni, D Arutinov, S Asai, R Asfandiyarov, S Ask, B Åsman, L Asquith, K Assamagan, A Astbury, A Astvatsatourov, G Atoian, B Aubert, B Auerbach, E Auge, K Augsten, M Aurousseau, N Austin, R Avramidou, D Axen, C Ay, G Azuelos, Y Azuma, MA Baak, G Baccaglioni, C Bacci, AM Bach, H Bachacou, K Bachas, G Bachy, M Backes, M Backhaus, E Badescu, P Bagnaia, S Bahinipati, Y Bai, DC Bailey, T Bain, JT Baines, OK Baker, MD Baker, S Baker, F Baltasar Dos Santos Pedrosa, E Banas, P Banerjee, Sw Banerjee, D Banfi, A Bangert, V Bansal, HS Bansil, L Barak, SP Baranov, A Barashkou, A Barbaro Galtieri, T Barber, EL Barberio, D Barberis, M Barbero, DY Bardin, T Barillari, M Barisonzi, T Barklow, N Barlow, BM Barnett, RM Barnett, A Baroncelli, AJ Barr, F Barreiro, J Barreiro GuimarĂŁes da Costa, P Barrillon, R Bartoldus, AE Barton, D Bartsch, V Bartsch, RL Bates, L Batkova, JR Batley, A Battaglia, M Battistin, G Battistoni, F Bauer, HS Bawa, B Beare, T Beau, PH Beauchemin, R Beccherle, P Bechtle, HP Beck, M Beckingham, KH Becks, AJ Beddall, A Beddall, VA Bednyakov, CP Bee, M Begel, S Behar Harpaz, PK Behera, M Beimforde, C Belanger-Champagne, PJ Bell, WH Bell, G Bella, L Bellagamba, F Bellina, G Bellomo, M Bellomo, A Belloni, O Beloborodova, K Belotskiy, O Beltramello, S Ben Ami, O Benary, D Benchekroun, C Benchouk, M Bendel, BH Benedict, N Benekos, Y Benhammou, DP Benjamin, M Benoit, JR Bensinger, K Benslama, S Bentvelsen, D Berge, E Bergeaas Kuutmann, N Berger, F Berghaus, E Berglund, J Beringer, K Bernardet, P Bernat, R Bernhard, C Bernius, T Berry, A Bertin, F Bertinelli, F Bertolucci, MI Besana, N Besson, S Bethke, W Bhimji, RM Bianchi, M Bianco, O Biebel, SP Bieniek, J Biesiada, M Biglietti, H Bilokon, M Bindi, S Binet, A Bingul, C Bini, C Biscarat, U Bitenc, KM Black, RE Blair, J-B Blanchard, G Blanchot, C Blocker, J Blocki, A Blondel, W Blum, U Blumenschein, GJ Bobbink, VB Bobrovnikov, A Bocci, CR Boddy, M Boehler, J Boek, N Boelaert, S Böser, JA Bogaerts, A Bogdanchikov, A Bogouch, C Bohm, V Boisvert, T Bold, V Boldea, M Bona, VG Bondarenko, M Boonekamp, G Boorman, CN Booth, P Booth, S Bordoni, C Borer, A Borisov, G Borissov, I Borjanovic, S Borroni, K Bos, D Boscherini, M Bosman, H Boterenbrood, D Botterill, J Bouchami, J Boudreau, EV Bouhova-Thacker, C Boulahouache, C Bourdarios, N Bousson, A Boveia, J Boyd, IR Boyko, NI Bozhko, I Bozovic-Jelisavcic, J Bracinik, A Braem, E Brambilla, P Branchini, GW Brandenburg, A Brandt, G Brandt, O Brandt, U Bratzler, B Brau, JE Brau, HM Braun, B Brelier, J Bremer, R Brenner, S Bressler, D Breton, ND Brett, PG Bright-Thomas, D Britton, FM Brochu, I Brock, R Brock, TJ Brodbeck, E Brodet, F Broggi, C Bromberg, G Brooijmans, WK Brooks, G Brown, E Brubaker, PA Bruckman de Renstrom, D Bruncko, R Bruneliere, S Brunet, A Bruni, G Bruni, M Bruschi, T Buanes, F Bucci, J Buchanan, NJ Buchanan, P Buchholz, RM Buckingham, AG Buckley, SI Buda, IA Budagov, B Budick, V BĂŒscher, L Bugge, D Buira-Clark, EJ Buis, O Bulekov, M Bunse, T Buran, H Burckhart, S Burdin, T Burgess, S Burke, E Busato, P Bussey, CP Buszello, F Butin, B Butler, JM Butler, CM Buttar, JM Butterworth, W Buttinger, T Byatt, S Cabrera UrbĂĄn, M Caccia, D Caforio, O Cakir, P Calafiura, G Calderini, P Calfayan, R Calkins, LP Caloba, R Caloi, D Calvet, S Calvet, R Camacho Toro, A Camard, P Camarri, M Cambiaghi, D Cameron, J Cammin, S Campana, M Campanelli, V Canale, F Canelli, A Canepa, J Cantero, L Capasso, MDM Capeans Garrido, I Caprini, M Caprini, D Capriotti, M Capua, R Caputo, C Caramarcu, R Cardarelli, T Carli, G Carlino, L Carminati, B Caron, S Caron, C Carpentieri, GD Carrillo Montoya, AA Carter, JR Carter, J Carvalho, D Casadei, MP Casado, M Cascella, C Caso, AM Castaneda Hernandez, E Castaneda-Miranda, V Castillo Gimenez, NF Castro, G Cataldi, F Cataneo, A Catinaccio, JR Catmore, A Cattai, G Cattani, S Caughron, D Cauz, A Cavallari, P Cavalleri, D Cavalli, M Cavalli-Sforza, V Cavasinni, A Cazzato, F Ceradini, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, SA Cetin, F Cevenini, A Chafaq, D Chakraborty, K Chan, B Chapleau, JD Chapman, JW Chapman, E Chareyre, DG Charlton, V Chavda, S Cheatham, S Chekanov, SV Chekulaev, GA Chelkov, H Chen, L Chen, S Chen, T Chen, X Chen, S Cheng, A Cheplakov, VF Chepurnov, R Cherkaoui El Moursli, V Chernyatin, E Cheu, SL Cheung, L Chevalier, F Chevallier, G Chiefari, L Chikovani, JT Childers, A Chilingarov, G Chiodini, MV Chizhov, G Choudalakis, S Chouridou, IA Christidi, A Christov, D Chromek-Burckhart, ML Chu, J Chudoba, G Ciapetti, K Ciba, AK Ciftci, R Ciftci, D Cinca, V Cindro, MD Ciobotaru, C Ciocca, A Ciocio, M Cirilli, M Ciubancan, A Clark, PJ Clark, W Cleland, JC Clemens, B Clement, C Clement, RW Clifft, Y Coadou, M Cobal, A Coccaro, J Cochran, P Coe, JG Cogan, J Coggeshall, E Cogneras, CD Cojocaru, J Colas, AP Colijn, C Collard, NJ Collins, C Collins-Tooth, J Collot, G Colon, R Coluccia, G Comune, P 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Jong, C De la Taille, B De Lotto, L De Mora, L De Nooij, M De Oliveira Branco, D De Pedis, P de Saintignon, A De Salvo, U De Sanctis, A De Santo, JB De Vivie de Regie, S Dean, DV Dedovich, J Degenhardt, M Dehchar, M Deile, C Del Papa, J Del Peso, T Del Prete, A Dell'Acqua, L Dell'Asta, M Della Pietra, D della Volpe, M Delmastro, P Delpierre, N Delruelle, PA Delsart, C Deluca, S Demers, M Demichev, B Demirkoz, J Deng, SP Denisov, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, E Devetak, PO Deviveiros, A Dewhurst, B DeWilde, S Dhaliwal, R Dhullipudi, A Di Ciaccio, L Di Ciaccio, A Di Girolamo, B Di Girolamo, S Di Luise, A Di Mattia, B Di Micco, R Di Nardo, A Di Simone, R Di Sipio, MA Diaz, F Diblen, EB Diehl, H Dietl, J Dietrich, TA Dietzsch, S Diglio, K Dindar Yagci, J Dingfelder, C Dionisi, P Dita, S Dita, F Dittus, F Djama, R Djilkibaev, T Djobava, MAB do Vale, A Do Valle Wemans, TKO Doan, M Dobbs, R Dobinson, D Dobos, E Dobson, M Dobson, J Dodd, OB Dogan, C Doglioni, T Doherty, Y Doi, J Dolejsi, I Dolenc, Z Dolezal, BA Dolgoshein, T Dohmae, M Donadelli, M Donega, J Donini, J Dopke, A Doria, A Dos Anjos, M Dosil, A Dotti, MT Dova, JD Dowell, AD Doxiadis, AT Doyle, Z Drasal, J Drees, N Dressnandt, H Drevermann, C Driouichi, M Dris, JG Drohan, J Dubbert, T Dubbs, S Dube, E Duchovni, G Duckeck, A Dudarev, F Dudziak, M DĂŒhrssen, IP Duerdoth, L Duflot, M-A Dufour, M Dunford, H Duran Yildiz, R Duxfield, M Dwuznik, F Dydak, D Dzahini, M DĂŒren, WL Ebenstein, J Ebke, S Eckert, S Eckweiler, K Edmonds, CA Edwards, I Efthymiopoulos, W Ehrenfeld, T Ehrich, T Eifert, G Eigen, K Einsweiler, E Eisenhandler, T Ekelof, M El Kacimi, M Ellert, S Elles, F Ellinghaus, K Ellis, N Ellis, J Elmsheuser, M Elsing, R Ely, D Emeliyanov, R Engelmann, A Engl, B Epp, A Eppig, J Erdmann, A Ereditato, D Eriksson, J Ernst, M Ernst, J Ernwein, D Errede, S Errede, E Ertel, M Escalier, C Escobar, X Espinal Curull, B Esposito, F Etienne, AI Etienvre, E Etzion, D Evangelakou, H Evans, L Fabbri, C Fabre, K Facius, RM Fakhrutdinov, S Falciano, AC Falou, Y Fang, M Fanti, A Farbin, A Farilla, J Farley, T Farooque, SM Farrington, P Farthouat, D Fasching, P Fassnacht, D Fassouliotis, B Fatholahzadeh, A Favareto, L Fayard, S Fazio, R Febbraro, P Federic, OL Fedin, I Fedorko, W Fedorko, M Fehling-Kaschek, L Feligioni, D Fellmann, CU Felzmann, C Feng, EJ Feng, AB Fenyuk, J Ferencei, J Ferland, B Fernandes, W Fernando, S Ferrag, J Ferrando, V Ferrara, A Ferrari, P Ferrari, R Ferrari, A Ferrer, ML Ferrer, D Ferrere, C Ferretti, A Ferretto Parodi, M Fiascaris, F Fiedler, A Filipčič, A Filippas, F Filthaut, M Fincke-Keeler, MCN Fiolhais, L Fiorini, A Firan, G Fischer, P Fischer, MJ Fisher, SM Fisher, J Flammer, M Flechl, I Fleck, J Fleckner, P Fleischmann, S Fleischmann, T Flick, LR Flores Castillo, MJ Flowerdew, F Föhlisch, M Fokitis, T Fonseca Martin, DA Forbush, A Formica, A Forti, D Fortin, JM Foster, D Fournier, A Foussat, AJ Fowler, K Fowler, H Fox, P Francavilla, S Franchino, D Francis, T Frank, M Franklin, S Franz, M Fraternali, S Fratina, ST French, R Froeschl, D Froidevaux, JA Frost, C Fukunaga, E Fullana Torregrosa, J Fuster, C Gabaldon, O Gabizon, T Gadfort, S Gadomski, G Gagliardi, P Gagnon, C Galea, EJ Gallas, MV Gallas, V Gallo, BJ Gallop, P Gallus, E Galyaev, KK Gan, YS Gao, VA Gapienko, A Gaponenko, F Garberson, M Garcia-Sciveres, C GarcĂ­a, JE GarcĂ­a Navarro, RW Gardner, N Garelli, H Garitaonandia, V Garonne, J Garvey, C Gatti, G Gaudio, O Gaumer, B Gaur, L Gauthier, IL Gavrilenko, C Gay, G Gaycken, J-C Gayde, EN Gazis, P Ge, CNP Gee, DAA Geerts, Ch Geich-Gimbel, K Gellerstedt, C Gemme, A Gemmell, MH Genest, S Gentile, S George, P Gerlach, A Gershon, C Geweniger, H Ghazlane, P Ghez, N Ghodbane, B Giacobbe, S Giagu, V Giakoumopoulou, V Giangiobbe, F Gianotti, B Gibbard, A Gibson, SM Gibson, GF Gieraltowski, LM Gilbert, M Gilchriese, V Gilewsky, D Gillberg, AR Gillman, DM Gingrich, J Ginzburg, N Giokaris, R Giordano, FM Giorgi, P Giovannini, PF 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Wraight, C Wright, B Wrona, SL Wu, X Wu, Y Wu, E Wulf, R Wunstorf, BM Wynne, L Xaplanteris, S Xella, S Xie, Y Xie, C Xu, D Xu, G Xu, B Yabsley, M Yamada, A Yamamoto, K Yamamoto, S Yamamoto, T Yamamura, J Yamaoka, T Yamazaki, Y Yamazaki, Z Yan, H Yang, UK Yang, Y Yang, Y Yang, Z Yang, S Yanush, W-M Yao, Y Yao, Y Yasu, GV Ybeles Smit, J Ye, S Ye, M Yilmaz, R Yoosoofmiya, K Yorita, R Yoshida, C Young, S Youssef, D Yu, J Yu, J Yu, L Yuan, A Yurkewicz, VG Zaets, R Zaidan, AM Zaitsev, Z Zajacova, Yo K Zalite, L Zanello, P Zarzhitsky, A Zaytsev, C Zeitnitz, M Zeller, PF Zema, A Zemla, C Zendler, AV Zenin, O Zenin, T ĆœeniĆĄ, Z Zenonos, S Zenz, D Zerwas, G Zevi della Porta, Z Zhan, D Zhang, H Zhang, J Zhang, X Zhang, Z Zhang, L Zhao, T Zhao, Z Zhao, A Zhemchugov, S Zheng, J Zhong, B Zhou, N Zhou, Y Zhou, CG Zhu, H Zhu, Y Zhu, X Zhuang, V Zhuravlov, D Zieminska, B Zilka, R Zimmermann, S Zimmermann, S Zimmermann, M Ziolkowski, R Zitoun, L Ćœivković, VV Zmouchko, G Zobernig, A Zoccoli, Y Zolnierowski, A Zsenei, M zur Nedden, V Zutshi, L Zwalinski, ATLAS Collaboration

Abstract:

This Letter presents the first search for supersymmetry in final states containing one isolated electron or muon, jets, and missing transverse momentum from √s=7  TeV proton-proton collisions at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of 35  pb(-1). No excess above the standard model background expectation is observed. Limits are set on the parameters of the minimal supergravity framework, extending previous limits. Within this framework, for A(0)=0 GeV, tanÎČ=3, and ÎŒ>0 and for equal squark and gluino masses, gluino masses below 700 GeV are excluded at 95% confidence level.

Observation of Bs0→J/ψK*(892)0 and Bs0→J/ψKS0 decays

Physical Review D - Particles, Fields, Gravitation and Cosmology 83:5 (2011)

Authors:

T Aaltonen, B Ávarez Gonzålez, 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, 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, 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, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli, C Cuenca Almenar, J Cuevas, R Culbertson

Abstract:

We report the first observation of two Cabibbo-suppressed decay modes of the Bs0 meson. Using a sample of pp̄ collisions at √s=1.96TeV corresponding to 5.9fb-1 of integrated luminosity collected with the CDF II, the collider detector at the Fermilab Tevatron, we search for new Bs0 decay modes in a sample of events containing J/ψ→Ό+ÎŒ - decays. We reconstruct a Bs0→J/ψK*(892)0 signal with K*(892)0→K+π-, observing a yield of 151±25 events with a statistical significance of 8.0σ. We also reconstruct a Bs0→J/ψKS0 signal with KS0→π+π-, observing a yield of 64±14 events with a statistical significance of 7.2σ. From these yields, we extract the branching ratios B(Bs0→J/ψK*(892)0)=(8. 3±3.8)×10-5 and B(Bs0→J/ψK0)=(3.5±0.8) ×10-5, where statistical, systematic, and fragmentation- fraction uncertainties are included in the combined uncertainty. © 2011 American Physical Society.

Search for a heavy gauge boson W' in the final state with an electron and large missing transverse energy in pp collisions at s=7 TeV

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 698:1 (2011) 21-39

Authors:

V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R FrĂŒhwirth, VM Ghete, J Hammer, S HĂ€nsel, C Hartl, M Hoch, N Hörmann, J Hrubec, M Jeitler, G Kasieczka, W Kiesenhofer, M Krammer, D Liko, I Mikulec, M Pernicka, H Rohringer, R Schöfbeck, J Strauss, A Taurok, F Teischinger, W Waltenberger, G Walzel, E Widl, C Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, L Benucci, K Cerny, EA De Wolf, X Janssen, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, H Van Haevermaet, P Van Mechelen, N Van Remortel, V Adler

Abstract:

A search for a heavy gauge boson W' has been conducted by the CMS experiment at the LHC in the decay channel with an electron and large transverse energy imbalance ETmiss, using proton-proton collision data corresponding to an integrated luminosity of 36 pb-1. No excess above standard model expectations is seen in the transverse mass distribution of the electron- ETmiss system. Assuming standard-model-like couplings and decay branching fractions, a W' boson with a mass less than 1.36 TeV/c2 is excluded at 95% confidence level. © 2011 CERN.