Data di Pubblicazione:
2014
Abstract:
A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at root s = 8 TeV. The top-quark decay considered in this search results in one light lepton (muon or electron), two jets, but no neutrino in the final state. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.5 fb(-1). The event selection is optimized for top quarks produced in pairs, with one undergoing the BNV decay and the other the standard model hadronic decay to three jets. No significant excess of events over the expected yield from standard model processes is observed. The upper limits at 95% confidence level on the branching fraction of the BNV top-quark decay are calculated to be 0.0016 and 0.0017 for the muon and the electron channels, respectively. Assuming lepton universality, an upper limit of 0.0015 results from the combination of the two channels. These limits are the first that have been obtained on a BNV process involving the top quark.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Chatrchyan S; Khachatryan V; Sirunyan AM; Tumasyan A; Adam W; Bergauer T; Dragicevic M; Ero J; Fabjan C; Friedl M; Fruhwirth R; Ghete VM; Hormann N; Hrubec J; Jeitler M; Kiesenhofer W; Knutz V; Krammer M; Kratschmer I; Liko D; Mikulec I; Rabady D; Rahbaran B; Rohringer C; Rohringer H; Schofbeck R; Strauss J; Taurok A; Treberer-Treberspurg W; Waltenberger W; Wulz CE; Mossolov V; Shumeiko N; Gonzalez JS; Alderweireldt S; Bansal M; Bansal S; Cornelis T; De Wolf EA; Janssen X; Knutsson A; Luyckx S; Mucibello L; Ochesanu S; Roland B; Rougny R; Staykova Z; Van Haevermaet H; Van Mechelen P; Van Remortel N; Van Spilbeeck A; Blekman F; Blyweert S; D'Hondt J; Kalogeropoulos A; Keaveney J; Lowette S; Maes M; Olbrechts A; Tavernier S; Van Doninck W; Van Mulders P; Van Onsem GP; Villella I; Caillol C; Clerbaux B; De Lentdecker G; Favart L; Gay APR; Hreus T; Leonard A; Marage PE; Mohammadi A; Pernie L; Reis T; Seva T; Thomas L; Vander Velde C; Vanlaer P; Wang J; Adler V; Beernaert K; Benucci L; Cimmino A; Costantini S; Dildick S; Garcia G; Klein B; Lellouch J; Marinov A; Mccartin J; Rios AAO; Ryckbosch D; Sigamani M; Strobbe N; Thyssen F; Tytgat M; Walsh S; Yazgan E; Zaganidis N; Basegmez S; Beluffi C; Bruno G; Castello R; Caudron A; Ceard L; Da Silveira GG; Delaere C; du Pree T; Favart D; Forthomme L; Giammanco A; Hollar J; Jez P; Lemaitre V; Liao J; Militaru O; Nuttens C; Pagano D; Pin A; Piotrzkowski K; Popov A; Selvaggi M; Marono MV; Garcia JMV; Beliy N; Caebergs T; Daubie E; Hammad GH; Alves GA; Martins MC; Martins T; Pol ME; Souza MHG; Alda WL; Carvalho W; Chinellato J; Custodio A; Da Costa EM; Damiao DD; Martins CD; De Souza SF; Malbouisson H; Malek M; Figueiredo DM; Mundim L; Nogima H; Da Silva WLP; Santoro A; Sznajder A; Manganote EJT; Pereira AV; Bernardes CA; Dias FA; Tomei TRFP; Gregores EM; Lagana C; Mercadante PG; Novaes SF; Padula SS; Genchev V; Iaydjiev P; Piperov S; Rodozov M; Sultanov G; Vutova M; Dimitrov A; Hadjiiska R; Kozhuharov V; Litov L; Pavlov B; Petkov P; Bian JG; Chen GM; Chen HS; Jiang CH; Liang D; Liang S; Meng X; Tao J; Wang X; Wang Z; Asawatangtrakuldee C; Ban Y; Guo Y; Li Q; Li W; Liu S; Mao Y; Qian SJ; Wang D; Zhang L; Zou W; Avila C; Montoya CAC; Sierra LFC; Gomez JP; Moreno BG; Sanabria JC; Godinovic N; Lelas D; Plestina R; Polic D; Puljak I; Antunovic Z; Kovac M; Brigljevic V; Kadija K; Luetic J; Mekterovic D; Morovic S; Tikvica L; Attikis A; Mavromanolakis G; Mousa J; Nicolaou C; Ptochos F; Razis PA; Finger M; Finger M; Abdelalim AA; Assran Y; Elgammal S; Kamel AE; Mahmoud MA; Radi A; Kadastik M; Muntel M; Murumaa M; Raidal M; Rebane L; Tiko A; Eerola P; Fedi G; Voutilainen M; Harkonen J; Karimaki V; Kinnunen R; Kortelainen MJ; Lampen T; Lassila-Perini K; Lehti S; Linden T; Luukka P; Maenpaa T; Peltola T; Tuominen E; Tuominiemi J; Tuovinen E; Wendland L; Tuuva T; Besancon M; Couderc F; Dejardin M; Denegri D; Fabbro B; Faure JL; Ferri F; Ganjour S; Givernaud A; Gras P; de Monchenault GH; Jarry P; Locci E; Malcles J; Millischer L; Nayak A; Rander J; Rosowsky A; Titov M; Baffioni S; Beaudette F; Benhabib L; Bluj M; Busson P; Charlot C; Daci N; Dahms T; Dalchenko M; Dobrzynski L; Florent A; de Cassagnac RG; Haguenauer M; Mine P; Mironov C; Naranjo IN; Nguyen M; Ochando C; Paganini P; Sabes D; Salerno R; Sirois Y; Veelken C; Zabi A; Agram JL; Andrea J; Bloch D; Brom JM; Chabert EC; Collard C; Conte E; Drouhin F; Fontaine JC; Gele D; Goerlach U; Goetzmann C; Juillot P; Le Bihan AC; Van Hove P; Gadrat S; Beauceron S; Beaupere N; Boudoul G; Brochet S; 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
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