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 Krämer, D Krücker, E Kuznetsova, W Lange, J Leonard, K Lipka, W Lohmann, B Lutz, R Mankel, I Marfin, I-A Melzer-Pellmann, AB Meyer, J Mnich, A Mussgiller, S Naumann-Emme, O Novgorodova, F Nowak, J Olzem, H Perrey, A Petrukhin, D Pitzl, R Placakyte, A Raspereza, PM Ribeiro Cipriano, C Riedl, E Ron, MÖ Sahin, J Salfeld-Nebgen, R Schmidt, T Schoerner-Sadenius, N Sen, M Stein, R Walsh, C Wissing, M Aldaya Martin, V Blobel, H Enderle, J Erfle, E Garutti, U Gebbert, M Görner, M Gosselink, J Haller, K Heine, RS Höing, G Kaussen, H Kirschenmann, R Klanner, R Kogler, J Lange, I Marchesini, T Peiffer, N Pietsch, D Rathjens, C Sander, H Schettler, P Schleper, E Schlieckau, A Schmidt, M Schröder, T Schum, M Seidel, J Sibille, V Sola, H Stadie, G Steinbrück, J Thomsen, D Troendle, E Usai, L Vanelderen, C Barth, C Baus, J Berger, C Böser, E Butz, T Chwalek, W De Boer, A Descroix, A Dierlamm, M Feindt, M Guthoff, F Hartmann, T Hauth, H Held, KH Hoffmann, U Husemann, I Katkov, JR Komaragiri, A Kornmayer, P Lobelle Pardo, D Martschei, MU Mozer, Th Müller, M Niegel, A Nürnberg, O Oberst, J Ott, G Quast, K Rabbertz, F Ratnikov, S Röcker, F-P Schilling, G Schott, HJ Simonis, FM Stober, R Ulrich, J Wagner-Kuhr, S Wayand, T Weiler, M Zeise, G Anagnostou, G Daskalakis, T Geralis, S Kesisoglou, A Kyriakis, D Loukas, A Markou, C Markou, E Ntomari, I Topsis-giotis, L Gouskos, A Panagiotou, N Saoulidou, E Stiliaris, X Aslanoglou, I Evangelou, G Flouris, C Foudas, P Kokkas, N Manthos, I Papadopoulos, E Paradas, G Bencze, C Hajdu, P Hidas, D Horvath, F Sikler, V Veszpremi, G Vesztergombi, AJ Zsigmond, N Beni, S Czellar, J Molnar, J Palinkas, Z Szillasi, J Karancsi, P Raics, ZL Trocsanyi, B Ujvari, N Sahoo, SK Swain, SB Beri, V Bhatnagar, N Dhingra, R Gupta, M Kaur, MZ Mehta, M Mittal, N Nishu, A Sharma, JB Singh, Ashok Kumar, Arun Kumar, S Ahuja, A Bhardwaj, BC Choudhary, A Kumar, S Malhotra, M Naimuddin, K Ranjan, P Saxena, V Sharma, RK Shivpuri, S Banerjee, S Bhattacharya, K Chatterjee, S Dutta, B Gomber, Sa Jain, Sh Jain, R Khurana, A Modak, S Mukherjee, D Roy, S Sarkar, M Sharan, AP Singh, A Abdulsalam, D Dutta, S Kailas, V Kumar, AK Mohanty, LM Pant, P Shukla, A Topkar, T Aziz, RM Chatterjee, S Ganguly, S Ghosh, M Guchait, A Gurtu, G Kole, S Kumar, M Maity, G Majumder, K Mazumdar, GB Mohanty, B Parida, K Sudhakar, N Wickramage, S Banerjee, S Dugad, H Arfaei, H Bakhshiansohi, SM Etesami, A Fahim, A Jafari, M Khakzad, M Mohammadi Najafabadi, S Paktinat Mehdiabadi, B Safarzadeh, M Zeinali, M Grunewald, M Abbrescia, L Barbone, C Calabria, SS Chhibra, A Colaleo, D Creanza, N De Filippis, M De Palma, L Fiore, G Iaselli, G Maggi, M Maggi, B Marangelli, S My, S Nuzzo, N Pacifico, A Pompili, G Pugliese, G Selvaggi, L Silvestris, G Singh, R Venditti, P Verwilligen, G Zito, G Abbiendi, AC Benvenuti, D Bonacorsi, S Braibant-Giacomelli, L Brigliadori, R Campanini, P Capiluppi, A Castro, FR Cavallo, G Codispoti, M Cuffiani, GM Dallavalle, F Fabbri, A Fanfani, D 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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 Collaboration
Abstract:
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.
