Khachatryan V.Sirunyan A.M.Tumasyan A.Adam W.Bergauer T.Dragicevic M.Erö J.Friedl M.Frühwirth R.Ghete V.M.Hartl C.Hörmann N.Hrubec J.Jeitler M.Kiesenhofer W.Knünz V.Krammer M.Krätschmer I.Liko D.Mikulec I.Rabady D.Rahbaran B.Rohringer H.Schöfbeck R.Strauss J.Treberer-Treberspurg W.Waltenberger W.Wulz C.-E.Mossolov V.Shumeiko N.Suarez Gonzalez J.Alderweireldt S.Bansal S.Cornelis T.De Wolf E.A.Janssen X.Knutsson A.Lauwers J.Luyckx S.Ochesanu S.Rougny R.Van De Klundert M.Van Haevermaet H.Van Mechelen P.Van Remortel N.Van Spilbeeck A.Blekman F.Blyweert S.D'Hondt J.Daci N.Heracleous N.Keaveney J.Lowette S.Maes M.Olbrechts A.Python Q.Strom D.Tavernier S.Van Doninck W.Van Mulders P.Van Onsem G.P.Villella I.Caillol C.Clerbaux B.De Lentdecker G.Dobur D.Favart L.Gay A.P.R.Grebenyuk A.Léonard A.Mohammadi A.Perniè L.Randle-conde A.Reis T.Seva T.Thomas L.Vander Velde C.Vanlaer P.Wang J.Zenoni F.Adler V.Beernaert K.Benucci L.Cimmino A.Costantini S.Crucy S.Dildick S.Fagot A.Garcia G.Mccartin J.Ocampo Rios A.A.Ryckbosch D.Salva Diblen S.Sigamani M.Strobbe N.Thyssen F.Tytgat M.Yazgan E.Zaganidis N.Basegmez S.Beluffi C.Bruno G.Castello R.Caudron A.Ceard L.DaSilveira G.G.Delaere C.Du Pree T.Favart D.Forthomme L.Giammanco A.Hollar J.Jafari A.Jez P.Komm M.Lemaitre V.Nuttens C.Pagano D.Perrini L.Pin A.Piotrzkowski K.Popov A.Quertenmont L.Selvaggi M.Vidal Marono M.Vizan Garcia J.M.Beliy N.Caebergs T.Daubie E.Hammad G.H.Aldá W.L.Alves G.A.Brito L.Correa Martins Junior M.Dos Reis Martins T.Mora Herrera C.Pol M.E.Rebello Teles P.Carvalho W.Chinellato J.Custódio A.Da Costa E.M.De Jesus Damiao D.De Oliveira Martins C.Fonseca De Souza S.Malbouisson H.Matos Figueiredo D.Mundim L.Nogima H.Prado Da Silva W.L.Santaolalla J.Santoro A.Sznajder A.Tonelli Manganote E.J.Vilela Pereira A.Bernardes C.A.Dogra S.Fernandez Perez Tomei T.R.Gregores E.M.Mercadante P.G.Novaes S.F.Padula S.Aleksandrov A.Genchev V.Hadjiiska R.Iaydjiev P.Marinov A.Piperov S.Rodozov M.Sultanov G.Vutova M.Dimitrov A.Glushkov I.Litov L.Pavlov B.Petkov P.Bian J.G.Chen G.M.Chen H.S.Chen M.Cheng T.Du R.Jiang C.H.Plestina R.Romeo F.Tao J.Wang Z.Asawatangtrakuldee C.Ban Y.Li Q.Liu S.Mao Y.Qian S.J.Wang D.Xu Z.Zou W.Avila C.Cabrera A.Chaparro Sierra L.F.Florez C.Gomez J.P.GomezMoreno B.Sanabria J.C.Godinovic N.Lelas D.Polic D.Puljak I.Antunovic Z.Kovac M.Brigljevic V.Kadija K.Luetic J.Mekterovic D.Sudic L.Attikis A.Mavromanolakis G.Mousa J.Nicolaou C.Ptochos F.Razis P.A.Bodlak M.Finger M.Finger M.Assran Y.Ellithi Kamel A.Mahmoud M.A.Radi A.Kadastik M.Murumaa M.Raidal M.Tiko A.Eerola P.Fedi G.Voutilainen M.Härkönen J.Karimäki V.Kinnunen R.Kortelainen M.J.Lampén T.Lassila- Perini K.Lehti S.Lindén T.Luukka P.Mäenpää T.Peltola T.Tuominen E.Tuominiemi J.Tuovinen E.Wendland L.Talvitie J.Tuuva T.Besancon M.Couderc F.Dejardin M.Denegri D.Fabbro B.Faure J.L.Favaro C.Ferri F.Ganjour S.Givernaud A.Gras P.HameldeMonchenault G.Jarry P.Locci E.Malcles J.Rander J.Rosowsky A.Titov M.Baffioni S.Beaudette F.Busson P.Charlot C.Dahms T.Dalchenko M.Dobrzynski L.Filipovic N.Florent A.Granier De Cassagnac R.Mastrolorenzo L.Miné P.Mironov C.Naranjo I.N.Nguyen M.Ochando C.Ortona G.Paganini P.Regnard S.Salerno R.Sauvan J.B.Sirois Y.Veelken C.Yilmaz Y.Zabi A.Agram J.-L.Andrea J.Aubin A.Bloch D.Brom J.-M.Chabert E.C.Collard C.Conte E.Fontaine J.-C.Gelé D.Goerlach U.Goetzmann C.Le Bihan A.-C.Skovpen K.VanHove P.Gadrat S.Beauceron S.Beaupere N.Boudoul G.Bouvier E.Brochet S.Carrillo Montoya C.A.Chasserat J.Chierici R.Contardo D.Depasse P.El Mamouni H.Fan J.Fay J.Gascon S.Gouzevitch M.Ille B.Kurca T.Lethuillier M.Mirabito L.Perries S.Ruiz Alvarez J.D.Sabes D.Sgandurra L.Sordini V.Vander Donckt M.Verdier P.Viret S.Xiao H.Tsamalaidze Z.Autermann C.Beranek S.Bontenackels M.Edelhoff M.Feld L.Heister A.Hindrichs O.Klein K.Ostapchuk A.Raupach F.Sammet J.Schael S.Schulte J.F.Weber H.Wittmer B.Zhukov V.Ata M.Brodski M.Dietz-Laursonn E.Duchardt D.Erdmann M.Fischer R.Gü th A.Hebbeker T.Heidemann C.Hoepfner K.Klingebiel D.Knutzen S.Kreuzer P.Merschmeyer M.Meyer A.Millet P.Olschewski M.Padeken K.Papacz P.Reithler H.Schmitz S.A.Sonnenschein L.Teyssier D.Thüer S.Weber M.Cherepanov V.Erdogan Y.Flügge G.Geenen H.Geisler M.Haj Ahmad W.Hoehle F.Kargoll B.Kress T.Kuessel Y.Künsken A.Lingemann J.Nowack A.Nugent I.M.Pooth O.Stahl A.AldayaMartin M.Asin I.Bartosik N.Behr J.Behrens U.Bell A.J.Bethani A.Borras K.Burgmeier A.Cakir A.Calligaris L.Campbell A.Choudhury S.Costanza F.Diez Pardos C.Dolinska G.Dooling S.Dorland T.Eckerlin G.Eckstein D.Eichhorn T.Flucke G.Garay Garcia J.Geiser A.Gunnellini P.Hauk J.Hempel M.Jung H.Kalogeropoulos A.Kasemann M.Katsas P.Kieseler J.Kleinwort C.Korol I.Krücker D.Lange W.Leonard J.Lipka K.Lobanov A.Lohmann W.Lutz B.Mankel R.Marfin I.Melzer-Pellmann I.-A.Meyer A.B.Mittag G.Mnich J.Mussgiller A.Naumann-Emme S.Nayak A.Ntomari E.Perrey H.Pitzl D.Placakyte R.Raspereza A.Ribeiro Cipriano P.M.Roland B.Ron E.Sahin M.O.Salfeld-Nebgen J.Saxena P.Schoerner-Sadenius T.Schröder M.Seitz C.Spannagel S.Vargas Trevino A.D.R.Walsh R.Wissing C.Blobel V.Centis Vignali M.Draeger A.R.Erfle J.Garutti E.Goebel K.Görner M.Haller J.Hoffmann M.Höing R.S.Junkes A.Kirschenmann H.Klanner R.Kogler R.Lange J.Lapsien T.Lenz T.Marchesini I.Ott J.Peiffer T.Perieanu A.Pietsch N.Poehlsen J.Poehlsen T.Rathjens D.Sander C.Schettler H.Schleper P.Schlieckau E.Schmidt A.Seidel M.Sola V.Stadie H.Steinbrü ck G.Troendle D.Usai E.Vanelderen L.Vanhoefer A.Barth C.Baus C.Berger J.Böser C.Butz E.Chwalek T.De Boer W.Descroix A.Dierlamm A.Feindt M.Frensch F.Giffels M.Gilbert A.Hartmann F.Hauth T.Husemann U.Katkov I.Kornmayer A.Kuznetsova E.Lobelle Pardo P.Mozer M.U.Müller T.Müller Th.Nürnberg A.Quast G.Rabbertz K.Röcker S.Simonis H.J.Stober F.M.Ulrich R.Wagner-Kuhr J.Wayand S.Weiler T.Wolf R.Anagnostou G.Daskalakis G.Geralis T.Giakoumopoulou V.A.Kyriakis A.Loukas D.Markou A.Markou C.Psallidas A.Topsis-Giotis I.Agapitos A.Kesisoglou S.Panagiotou A.Saoulidou N.Stiliaris E.Aslanoglou X.Evangelou I.Flouris G.Foudas C.Kokkas P.Manthos N.Papadopoulos I.Paradas E.Strologas J.Bencze G.Hajdu C.Hidas P.Horvath D.Sikler F.Veszpremi V.Vesztergombi G.Zsigmond A.J.Beni N.Czellar S.Karancsi J.Molnar J.Palinkas J.Szillasi Z.Makovec A.Raics P.Trocsanyi Z.L.Ujvari B.Sahoo N.Swain S.K.Beri S.B.Bhatnagar V.Gupta R.Bhawandeep U.Kalsi A.K.Kaur M.Kumar R.Mittal M.Nishu N.Singh J.B.Kumar A.Kumar A.Ahuja S.Bhardwaj A.Choudhary B.C.Malhotra S.Naimuddin M.Ranjan K.Sharma V.Banerjee S.Bhattacharya S.Chatterjee K.Dutta S.Gomber B.Jain Sa.Jain Sh.Khurana R.Modak A.Mukherjee S.Roy D.Sarkar S.Sharan M.Abdulsalam A.Dutta D.Kailas S.Kumar V.Mohanty A.K.Pant L.M.Shukla P.Topkar A.Aziz T.Banerjee S.Bhowmik S.Chatterjee R.M.Dewanjee R.K.Dugad S.Ganguly S.Ghosh S.Guchait M.Gurtu A.Kole G.Kumar S.Maity M.Majumder G.Mazumdar K.Mohanty G.B.Parida B.Sudhakar K.Wickramage N.Bakhshiansohi H.Behnamian H.Etesami S.M.Fahim A.Goldouzian R.Khakzad M.Mohammadi Najafabadi M.Naseri M.Paktinat Mehdiabadi S.Rezaei Hosseinabadi F.Safarzadeh B.Zeinali M.Felcini M.Grunewald M.Abbrescia M.Calabria C.Chhibra S.S.Colaleo A.Creanza D.De Filippis N.De Palma M.Fiore L.Iaselli G.Maggi G.Maggi M.My S.Nuzzo S.Pompili A.Pugliese G.Radogna R.Selvaggi G.Sharma A.Silvestris L.Venditti R.Verwilligen P.Abbiendi G.Benvenuti A.C.Bonacorsi D.Braibant-Giacomelli S.Brigliadori L.Campanini R.Capiluppi P.Castro A.Cavallo F.R.Codispoti G.Cuffiani M.Dallavalle G.M.Fabbri F.Fanfani A.Fasanella D.Grandi C.Guiducci L.Marcellini S.Masetti G.Montanari A.Navarria F.L.Perrotta A.Primavera F.Rossi A.M.Rovelli T.Siroli G.P.Tosi N.Travaglini R.Albergo S.Cappello G.Chiorboli M.Costa S.Giordano F.Potenza R.Tricomi A.Tuve C.Barbagli G.Ciulli V.Civinini C.D'Alessandro R.Focardi E.Gallo E.Gonzi S.Gori V.Lenzi P.Meschini M.Paoletti S.Sguazzoni G.Tropiano A.Benussi L.Bianco S.Fabbri F.Piccolo D.Ferretti R.Ferro F.Lo Vetere M.Robutti E.Tosi S.Dinardo M.E.Fiorendi S.Gennai S.Gerosa R.Ghezzi A.Govoni P.Lucchini M.T.Malvezzi S.Manzoni R.A.Martelli A.Marzocchi B.Menasce D.Moroni L.Paganoni M.Pedrini D.Ragazzi S.Redaelli N.De Fatis Tabarelli T.Buontempo S.Cavallo N.Di Guida S.Fabozzi F.Iorio A.O.M.Lista L.Meola S.Merola M.Paolucci P.Azzi P.Bacchetta N.Bisello D.Branca A.Carlin R.Checchia P.Dall'Osso M.Dorigo T.Dosselli U.Galanti M.Gasparini F.Gasparini U.Giubilato P.Gozzelino A.Kanishchev K.Lacaprara S.Margoni M.Meneguzzo A.T.Pazzini J.Pozzobon N.Ronchese P.Simonetto F.Torassa E.Tosi M.Zotto P.Zucchetta A.Zumerle G.Gabusi M.Ratti S.P.Re V.Riccardi C.Salvini P.Vitulo P.Biasini M.Bilei G.M.Ciangottini D.Fanò L.Lariccia P.Mantovani G.Menichelli M.Saha A.Santocchia A.Spiezia A.Androsov K.Azzurri P.Bagliesi G.Boccali T.Broccolo G.Castaldi R.Ciocci M.A.Dell'Orso R.Donato S.Fiori F.Foà L.Giassi A.Grippo M.T.Ligabue F.Lomtadze T.Martini L.Messineo A.Moon C.S.Palla F.Rizzi A.Savoy-Navarro A.Serban A.T.Spagnolo P.Squillacioti P.Tenchini R.Tonelli G.Venturi A.Verdini P.G.Vernieri C.Barone L.Cavallari F.D'Imperio G.Del Re D.Diemoz M.Jorda C.Longo E.Margaroli F.Meridiani P.Micheli F.Nourbakhsh S.Organtini G.Paramatti R.Rahatlou S.Rovelli C.Santanastasio F.Soffi L.Traczyk P.Amapane N.Arcidiacono R.Argiro S.Arneodo M.Bellan R.Biino C.Cartiglia N.Casasso S.Costa M.Degano A.Demaria N.Finco L.Mariotti C.Maselli S.Migliore E.Monaco V.Musich M.Obertino M.M.Pacher L.Pastrone N.Pelliccioni M.Pinna Angioni G.L.Potenza A.Romero A.Ruspa M.Sacchi R.Solano A.Staiano A.Tamponi U.Belforte S.Candelise V.Casarsa M.Cossutti F.Della Ricca G.Gobbo B.La Licata C.Marone M.Schizzi A.Umer T.Zanetti A.Chang S.Kropivnitskaya A.Nam S.K.Kim D.H.Kim G.N.Kim M.S.Kong D.J.Lee S.Oh Y.D.Park H.Sakharov A.Son D.C.Kim T.J.Kim J.Y.Song S.Choi S.Gyun D.Hong B.Jo M.Kim H.Kim Y.Lee B.Lee K.S.Park S.K.Roh Y.Yoo H.D.Choi M.Kim J.H.Park I.C.Ryu G.Ryu M.S.Choi Y.Choi Y.K.Goh J.Kim D.Kwon E.Lee J.Yu I.Juodagalvis A.Komaragiri J.R.Md Ali M.A.B.Casimiro Linares E.Castilla-Valdez H.De La Cruz-Burelo E.De La Cruz Heredia I.Hernandez-Almada A.Lopez-Fernandez R.Sanchez-Hernandez A.Carrillo Moreno S.Vazquez Valencia F.Pedraza I.Salazar Ibarguen H.A.Morelos Pineda A.Krofcheck D.Butler P.H.Reucroft S.Ahmad A.Ahmad M.Hassan Q.Hoorani H.R.Khan W.A.Khurshid T.Shoaib M.Bialkowska H.Bluj M.Boimska B.Frueboes T.Górski M.Kazana M.Nawrocki K.Romanowska-Rybinska K.Szleper M.Zalewski P.Brona G.Bunkowski K.Cwiok M.Dominik W.Doroba K.Kalinowski A.Konecki M.Krolikowski J.Misiura M.Olszewski M.Wolszczak W.Bargassa P.Da Cruz E Silva Beirao C.Faccioli P.Ferreira Parracho P.G.Gallinaro M.Lloret Iglesias L.Nguyen F.Rodrigues Antunes J.Seixas J.Varela J.Vischia P.Afanasiev S.Bunin P.Gavrilenko M.Golutvin I.Gorbunov I.Kamenev A.Karjavin V.Konoplyanikov V.Lanev A.Malakhov A.Matveev V.Moisenz P.Palichik V.Perelygin V.Shmatov S.Skatchkov N.Smirnov V.Zarubin A.Golovtsov V.Ivanov Y.Kim V.Levchenko P.Murzin V.Oreshkin V.Smirnov I.Sulimov V.Uvarov L.Vavilov S.Vorobyev A.Vorobyev An.Andreev Yu.Dermenev A.Gninenko S.Golubev N.Kirsanov M.Krasnikov N.Pashenkov A.Tlisov D.Toropin A.Epshteyn V.Gavrilov V.Lychkovskaya N.Popov V.Pozdnyakov I.Safronov G.Semenov S.Spiridonov A.Stolin V.Vlasov E.Zhokin A.Andreev V.Azarkin M.Dremin I.Kirakosyan M.Leonidov A.Mesyats G.Rusakov S.V.Vinogradov A.Belyaev A.Boos E.Dubinin M.Dudko L.Ershov A.Gribushin A.Klyukhin V.Kodolova O.Lokhtin I.Obraztsov S.Petrushanko S.Savrin V.Snigirev A.Azhgirey I.Bayshev I.Bitioukov S.Kachanov V.Kalinin A.Konstantinov D.Krychkine V.Petrov V.Ryutin R.Sobol A.Tourtchanovitch L.Troshin S.Tyurin N.Uzunian A.Volkov A.Adzic P.Ekmedzic M.Milosevic J.Rekovic V.Alcaraz Maestre J.Battilana C.Calvo E.Cerrada M.Chamizo Llatas M.Colino N.De La Cruz B.Delgado Peris A.Domínguez Vázquez D.Escalante Del Valle A.Fernandez Bedoya C.Fernández Ramos J.P.Flix J.Fouz M.C.Garcia-Abia P.Gonzalez Lopez O.Goy Lopez S.Hernandez J.M.Josa M.I.Navarro De Martino E.Pérez-Calero Yzquierdo A.PuertaPelayo J.QuintarioOlmeda A.Redondo I.Romero L.Soares M.S.Albajar C.De Trocóniz J.F.Missiroli M.Moran D.Brun H.Cuevas J.Fernandez Menendez J.Folgueras S.Gonzalez Caballero I.Brochero Cifuentes J.A.Cabrillo I.J.Calderon A.Duarte Campderros J.Fernandez M.Gomez G.Graziano A.Lopez Virto A.Marco J.Marco R.Martinez Rivero C.Matorras F.Munoz Sanchez F.J.Rodrigo T.Rodríguez-Marrero A.Y.Ruiz- Jimeno A.Scodellaro L.Vila I.VilarCortabitarte R.Abbaneo D.Auffray E.Auzinger G.Bachtis M.Baillon P.Ball A.H.Barney D.Benaglia A.Bendavid J.Benhabib L.Benitez J.F.Bernet C.Bloch P.Bocci A.Bonato A.Bondu O.Botta C.Breuker H.Camporesi T.Cerminara G.Colafranceschi S.D'Alfonso M.D'Enterria D.Dabrowski A.David A.De Guio F.De Roeck A.De Visscher S.Di Marco E.Dobson M.Dordevic M.Dupont-Sagorin N.Elliott-Peisert A.Franzoni G.Funk W.Gigi D.Gill K.Giordano D.Girone M.Glege F.Guida R.Gundacker S.Guthoff M.Hammer J.Hansen M.Harris P.Hegeman J.Innocente V.Janot P.Kousouris K.Krajczar K.Lecoq P.Lourenço C.Magini N.Malgeri L.Mannelli M.2024-07-222024-07-22201500280836http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/16323The standard model of particle physics describes the fundamental particles and their interactions via the strong, electromagnetic and weak forces. It provides precise predictions for measurable quantities that can be tested experimentally. The probabilities, or branching fractions, of the strangeB meson (B0 s ) andtheB0meson decaying into two oppositely charged muons (μ+ and μ-) are especially interesting because of their sensitivity to theories that extend the standard model. The standard model predicts that the B0 s→μ+μ- and B0 s→μ+μ- decays are very rare, with about four of the former occurring for every billion B0 s mesons produced, and one of the latter occurring for every ten billion B0 mesons1. A difference in the observed branching fractions with respect to the predictions of the standard model would provide a direction in which the standard model should be extended. Before the Large Hadron Collider (LHC) at CERN2 started operating, no evidence for either decay mode had been found. Upper limits on the branching fractions were an order of magnitude above the standard model predictions. The CMS (CompactMuonSolenoid) andLHCb(LargeHadronCollider beauty) collaborations have performed a joint analysis of the data from proton'proton collisions that they collected in 2011 at a centre-ofmass energy of seven teraelectronvolts and in 2012 at eight teraelectronvolts. Here we report the first observation of the B0 s→μ+μ- decay, with a statistical significance exceeding six standard deviations, and the best measurement so far of its branching fraction. Furthermore, we obtained evidence for the B0 s→μ+μ- decay with a statistical significance of three standard deviations. Both measurements are statistically compatible with standard model predictions and allow stringent constraints to be placed on theories beyond the standardmodel. The LHCexperimentswill resume taking data in 2015, recording proton'proton collisions at a centre-of-mass energy of 13 teraelectronvolts, which will approximately double the production rates of B0 s and B0 mesons and lead to further improvements in the precision of these crucial tests of the standard model. © 2015 Macmillan Publishers Limited. All rights reserved.EnglishAll Open Access; Hybrid Gold Open Accessprotondata processingelectromagnetic fieldelectromagnetic radiationfundamental particleGaussian methodphysicsprecisionArticlechemical analysischemical analyzerchemical reactionelementary particleLarge Hadron Collider beautymass spectrometrymesonnull hypothesispredictionpriority journalprobabilityradioisotope decaystandarduncertaintyArticle10.1038/nature14474