Search for a new bottomonium state decaying to Upsilon(1S) pi+ pi- in pp collisions at sqrt(s) = 8 TeV
ArXiv 1309.025 (2013)
Search for supersymmetry in hadronic final states with missing transverse energy using the variables αT and b-quark multiplicity in pp collisions at √s = 8 TeV
European Physical Journal C 73:9 (2013) 1-31
Authors:
S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, D Rabady, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, W Treberer-treberspurg, W Waltenberger, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Alderweireldt, M Bansal, S Bansal, T Cornelis, EA De Wolf, X Janssen, A Knutsson, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D'Hondt, R Gonzalez Suarez, A Kalogeropoulos, J Keaveney, M Maes, A Olbrechts, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, B Clerbaux, G De Lentdecker, V Dero, APR Gay, T Hreus, A Léonard, PE Marage, A Mohammadi, T Reis, L Thomas, C Vander Velde, P Vanlaer, J Wang, V Adler, K Beernaert, L Benucci, A Cimmino, S Costantini, G Garcia, M Grunewald, B Klein, J Lellouch, A Marinov, J Mccartin, AA Ocampo Rios, D Ryckbosch, M Sigamani, N Strobbe, F Thyssen, M Tytgat, S Walsh, E Yazgan, N Zaganidis, S Basegmez, G Bruno, R Castello, L CeardAbstract:
An inclusive search for supersymmetric processes that produce final states with jets and missing transverse energy is performed in pp collisions at a centre-of-mass energy of 8 TeV. The data sample corresponds to an integrated luminosity of 11.7 fb-1 collected by the CMS experiment at the LHC. In this search, a dimensionless kinematic variable, α T, is used to discriminate between events with genuine and misreconstructed missing transverse energy. The search is based on an examination of the number of reconstructed jets per event, the scalar sum of transverse energies of these jets, and the number of these jets identified as originating from bottom quarks. No significant excess of events over the standard model expectation is found. Exclusion limits are set in the parameter space of simplified models, with a special emphasis on both compressed-spectrum scenarios and direct or gluino-induced production of third-generation squarks. For the case of gluino-mediated squark production, gluino masses up to 950-1125 GeV are excluded depending on the assumed model. For the direct pair-production of squarks, masses up to 450 GeV are excluded for a single light first- or second-generation squark, increasing to 600 GeV for bottom squarks. © 2013 CERN for the benefit of the CMS collaboration.Measurement of the Bs(0)→μ+ μ- branching fraction and search for B(0)→μ+ μ- with the CMS experiment.
Physical review letters 111:10 (2013) 101804
Authors:
S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, D Rabady, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, W Treberer-Treberspurg, W Waltenberger, C-E Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Alderweireldt, M Bansal, S Bansal, T Cornelis, EA De Wolf, X Janssen, A Knutsson, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, Z Staykova, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D'Hondt, A Kalogeropoulos, J Keaveney, S Lowette, M Maes, A Olbrechts, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, C Caillol, B Clerbaux, G De Lentdecker, L Favart, APR Gay, T Hreus, A Léonard, PE Marage, A Mohammadi, L Perniè, T Reis, T Seva, L Thomas, C Vander Velde, P Vanlaer, J Wang, V Adler, K Beernaert, L Benucci, A Cimmino, S Costantini, S Dildick, G Garcia, B Klein, J Lellouch, A Marinov, J Mccartin, AA Ocampo Rios, D Ryckbosch, M Sigamani, N Strobbe, F Thyssen, M Tytgat, S Walsh, E Yazgan, N Zaganidis, S Basegmez, C Beluffi, G Bruno, R Castello, A Caudron, L Ceard, GG Da Silveira, C Delaere, T du Pree, D Favart, L Forthomme, A Giammanco, J Hollar, P Jez, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, A Pin, K Piotrzkowski, A Popov, M Selvaggi, M Vidal Marono, JM Vizan Garcia, N Beliy, T Caebergs, E Daubie, GH Hammad, GA Alves, M Correa Martins Junior, T Martins, ME Pol, MHG Souza, WL Aldá Júnior, W Carvalho, J Chinellato, A Custódio, EM Da Costa, D De Jesus Damiao, C De Oliveira Martins, S Fonseca De Souza, H Malbouisson, M Malek, D Matos Figueiredo, L Mundim, H Nogima, WL Prado Da Silva, A Santoro, A Sznajder, EJ Tonelli Manganote, A Vilela Pereira, CA Bernardes, FA Dias, TR Fernandez Perez Tomei, EM Gregores, C Lagana, PG Mercadante, SF Novaes, Sandra S Padula, V Genchev, P Iaydjiev, S Piperov, M Rodozov, G Sultanov, M Vutova, A Dimitrov, R Hadjiiska, V Kozhuharov, L Litov, B Pavlov, P Petkov, JG Bian, GM Chen, HS Chen, CH Jiang, D Liang, S Liang, X Meng, J Tao, X Wang, Z Wang, C Asawatangtrakuldee, Y Ban, Y Guo, W Li, S Liu, Y Mao, SJ Qian, H Teng, D Wang, L Zhang, W Zou, C Avila, CA Carrillo Montoya, LF Chaparro Sierra, JP Gomez, B Gomez Moreno, JC Sanabria, N Godinovic, D Lelas, R Plestina, D Polic, I Puljak, Z Antunovic, M Kovac, V Brigljevic, K Kadija, J Luetic, D Mekterovic, S Morovic, L Tikvica, A Attikis, G Mavromanolakis, J Mousa, C Nicolaou, F Ptochos, PA Razis, M Finger, M Finger, Y Assran, S Elgammal, A Ellithi Kamel, AM Kuotb Awad, MA Mahmoud, A Radi, M Kadastik, M Müntel, M Murumaa, M Raidal, L Rebane, A Tiko, P Eerola, G Fedi, M Voutilainen, J Härkönen, V Karimäki, R Kinnunen, MJ Kortelainen, T Lampén, K Lassila-Perini, S Lehti, T Lindén, P Luukka, T Mäenpää, T Peltola, E Tuominen, J Tuominiemi, E Tuovinen, L Wendland, T Tuuva, M Besancon, F Couderc, M Dejardin, D Denegri, B Fabbro, JL Faure, F Ferri, S Ganjour, A Givernaud, P Gras, G Hamel de Monchenault, P Jarry, E Locci, J Malcles, L Millischer, A Nayak, J Rander, A Rosowsky, M Titov, S Baffioni, F Beaudette, L Benhabib, M Bluj, P Busson, C Charlot, N Daci, T Dahms, M Dalchenko, L Dobrzynski, A Florent, R Granier de Cassagnac, M Haguenauer, P Miné, C Mironov, IN Naranjo, M Nguyen, C Ochando, P Paganini, D Sabes, R Salerno, Y Sirois, C Veelken, A Zabi, J-L Agram, J Andrea, D Bloch, J-M Brom, EC Chabert, C Collard, E Conte, F Drouhin, J-C Fontaine, D Gelé, U Goerlach, C Goetzmann, P Juillot, A-C Le Bihan, P Van Hove, S Gadrat, S Beauceron, N Beaupere, G Boudoul, S Brochet, J Chasserat, R Chierici, D Contardo, P Depasse, H El Mamouni, J Fan, J Fay, S Gascon, M Gouzevitch, B Ille, T Kurca, M Lethuillier, L Mirabito, S Perries, L Sgandurra, V Sordini, M Vander Donckt, P Verdier, S Viret, H Xiao, Z Tsamalaidze, C Autermann, S Beranek, M Bontenackels, B Calpas, M Edelhoff, L Feld, N Heracleous, O Hindrichs, K Klein, A Ostapchuk, A Perieanu, F Raupach, J Sammet, S Schael, D Sprenger, H Weber, B Wittmer, V Zhukov, M Ata, J Caudron, E Dietz-Laursonn, D Duchardt, M Erdmann, R Fischer, A Güth, T Hebbeker, C Heidemann, K Hoepfner, D Klingebiel, S Knutzen, P Kreuzer, M Merschmeyer, A Meyer, M Olschewski, K Padeken, P Papacz, H Pieta, H Reithler, SA Schmitz, L Sonnenschein, J Steggemann, D Teyssier, S Thüer, M Weber, V Cherepanov, Y Erdogan, G Flügge, H Geenen, M Geisler, W Haj Ahmad, F Hoehle, B Kargoll, T Kress, Y Kuessel, J Lingemann, A Nowack, IM Nugent, L Perchalla, O Pooth, A Stahl, I Asin, N Bartosik, J Behr, W Behrenhoff, U Behrens, AJ Bell, M Bergholz, A Bethani, K Borras, A Burgmeier, A Cakir, L Calligaris, A Campbell, S Choudhury, F Costanza, C Diez Pardos, S Dooling, T Dorland, G Eckerlin, D Eckstein, G Flucke, A Geiser, I Glushkov, A Grebenyuk, P Gunnellini, S Habib, J Hauk, G Hellwig, D Horton, H Jung, M Kasemann, P Katsas, C Kleinwort, H Kluge, M 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C Farrell, M Felcini, J Hauser, M Ignatenko, C Jarvis, G Rakness, P Schlein, E Takasugi, P Traczyk, V Valuev, M Weber, J Babb, R Clare, J Ellison, JW Gary, G Hanson, J Heilman, P Jandir, H Liu, OR Long, A Luthra, M Malberti, H Nguyen, A Shrinivas, J Sturdy, S Sumowidagdo, R Wilken, S Wimpenny, W Andrews, JG Branson, GB Cerati, S Cittolin, D Evans, A Holzner, R Kelley, M Lebourgeois, J Letts, I Macneill, S Padhi, C Palmer, G Petrucciani, M Pieri, M Sani, V Sharma, S Simon, E Sudano, M Tadel, Y Tu, A Vartak, S Wasserbaech, F Würthwein, A Yagil, J Yoo, D Barge, C Campagnari, T Danielson, K Flowers, P Geffert, C George, F Golf, J Incandela, C Justus, D Kovalskyi, V Krutelyov, R Magaña Villalba, N Mccoll, V Pavlunin, J Richman, R Rossin, D Stuart, W To, C West, A Apresyan, A Bornheim, J Bunn, Y Chen, E Di Marco, J Duarte, D Kcira, Y Ma, A Mott, HB Newman, C Pena, C Rogan, M Spiropulu, V Timciuc, J Veverka, R Wilkinson, S Xie, RY Zhu, V Azzolini, A Calamba, R Carroll, T Ferguson, Y Iiyama, 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W Clarida, K Dilsiz, F Duru, S Griffiths, J-P Merlo, H Mermerkaya, A Mestvirishvili, A Moeller, J Nachtman, CR Newsom, H Ogul, Y Onel, F Ozok, S Sen, P Tan, E Tiras, J Wetzel, T Yetkin, K Yi, BA Barnett, B Blumenfeld, S Bolognesi, G Giurgiu, AV Gritsan, G Hu, P Maksimovic, C Martin, M Swartz, A Whitbeck, P Baringer, A Bean, G Benelli, RP Kenny, M Murray, D Noonan, S Sanders, R Stringer, JS Wood, AF Barfuss, I Chakaberia, A Ivanov, S Khalil, M Makouski, Y Maravin, LK Saini, S Shrestha, I Svintradze, J Gronberg, D Lange, F Rebassoo, D Wright, A Baden, B Calvert, SC Eno, JA Gomez, NJ Hadley, RG Kellogg, T Kolberg, Y Lu, M Marionneau, AC Mignerey, K Pedro, A Peterman, A Skuja, J Temple, MB Tonjes, SC Tonwar, A Apyan, G Bauer, W Busza, IA Cali, M Chan, L Di Matteo, V Dutta, G Gomez Ceballos, M Goncharov, D Gulhan, Y Kim, M Klute, YS Lai, A Levin, PD Luckey, T Ma, S Nahn, C Paus, D Ralph, C Roland, G Roland, GSF Stephans, F Stöckli, K Sumorok, D Velicanu, R Wolf, B Wyslouch, M Yang, Y 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Mesropian, S Arora, A Barker, JP Chou, C Contreras-Campana, E Contreras-Campana, D Duggan, D Ferencek, Y Gershtein, R Gray, E Halkiadakis, D Hidas, A Lath, S Panwalkar, M Park, R Patel, V Rekovic, J Robles, S Salur, S Schnetzer, C Seitz, S Somalwar, R Stone, S Thomas, P Thomassen, M Walker, G Cerizza, M Hollingsworth, K Rose, S Spanier, ZC Yang, A York, O Bouhali, R Eusebi, W Flanagan, J Gilmore, T Kamon, V Khotilovich, R Montalvo, I Osipenkov, Y Pakhotin, A Perloff, J Roe, A Safonov, T Sakuma, I Suarez, A Tatarinov, D Toback, N Akchurin, C Cowden, J Damgov, C Dragoiu, PR Dudero, K Kovitanggoon, SW Lee, T Libeiro, I Volobouev, E Appelt, AG Delannoy, S Greene, A Gurrola, W Johns, C Maguire, Y Mao, A Melo, M Sharma, P Sheldon, B Snook, S Tuo, J Velkovska, MW Arenton, S Boutle, B Cox, B Francis, J Goodell, R Hirosky, A Ledovskoy, C Lin, C Neu, J Wood, S Gollapinni, R Harr, PE Karchin, C Kottachchi Kankanamge Don, P Lamichhane, A Sakharov, DA Belknap, L Borrello, D Carlsmith, M Cepeda, S Dasu, S Duric, E Friis, M Grothe, R Hall-Wilton, M Herndon, A Hervé, P Klabbers, J Klukas, A Lanaro, R Loveless, A Mohapatra, I Ojalvo, T Perry, GA Pierro, G Polese, I Ross, T Sarangi, A Savin, WH Smith, J Swanson, CMS CollaborationAbstract:
Results are presented from a search for the rare decays Bs(0)→μ+ μ- and B(0)→μ+ μ- in pp collisions at sqrt[s]=7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 fb(-1), respectively, collected by the CMS experiment at the LHC. An unbinned maximum-likelihood fit to the dimuon invariant mass distribution gives a branching fraction B(Bs(0)→μ+ μ-)=(3.0(-0.9)(+1.0))×10(-9), where the uncertainty includes both statistical and systematic contributions. An excess of Bs(0)→μ+ μ- events with respect to background is observed with a significance of 4.3 standard deviations. For the decay B(0)→μ+ μ- an upper limit of B(B(0)→μ+ μ-)<1.1×10(-9) at the 95% confidence level is determined. Both results are in agreement with the expectations from the standard model.Instrumentation for the Energy Frontier
ArXiv 1309.0162 (2013)
Authors:
Ulrich Heintz, Daniela Bortoletto, Marcus Hohlmann, Thomas LeCompte, Ron Lipton, Meenakshi Narain, Andrew WhiteMeasurement of the W gamma and Z gamma inclusive cross sections in pp collisions at sqrt(s) = 7 TeV and limits on anomalous triple gauge boson couplings
ArXiv 1308.6832 (2013)