Search for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV

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Abstract

The results of a search for flavor changing neutral currents in top quark decays t -> Zq in events with a topology compatible with the decay chain t (t) over bar -> Wb + Zq -> lvb + llq are presented. The search is performed with a data sample corresponding to an integrated luminosity of 5.0 fb(-1) of proton-proton collisions at a center-of-mass energy of 7 TeV, collected with the CMS detector at the LHC. The observed number of events agrees with the standard model prediction and no evidence for flavor changing neutral currents in top quark decays is found. A t -> Zq branching fraction greater than 0.21% is excluded at the 95% confidence level. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.

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  • Chatrchyan S , Khachatryan V , Sirunyan AM , Tumasyan A , Adam W , Aguilo E , Bergauer T , Dragicevic M , Eroe J , Fabjan C , Friedl M , Fruehwirth R , Ghete VM , Hammer J , Hoermann N , Hrubec J , Jeitler M , Kiesenhofer W , Knuenz V , Krammer M , Liko D , Mikulec I , Pernicka M , Rahbaran B , Rohringer C , Rohringer H , Schoefbeck R , Strauss J , Taurok A , Wagner P , Waltenberger W , Walzel G , Widl E , Wulz CE , Mossolov V , Shumeiko N , Gonzalez JS , Bansal S , Cornelis T , De Wolf EA , Janssen X , Luyckx S , Mucibello L , Ochesanu S , Roland B , Rougny R , Selvaggi M , Staykova Z , Van Haevermaet H , Van Mechelen P , Van Remortel N , Van Spilbeeck A , Blekman F , Blyweert S , D'Hondt J , Suarez RG , Kalogeropoulos A , Maes M , Olbrechts A , Van Doninck W , Van Mulders R , Van Onsem GP , Villella I , Clerbaux B , De Lentdecker G , Dero V , Gay APR , Hreus T , Leonard A , Marage PE , Reis T , Thomas L , Velde CV , Vanlaer P , Wang J , Adler V , Beernaert K , Cimmino A , Costantini S , Garcia G , Grunewald M , Klein B , Lellouch J , Marinov A , Mccartin J , Rios AAO , Ryckbosch D , Strobbe N , Thyssen F , Tytgat M , Verwilligen P , Walsh S , Yazgan E , Zaganidis N , Basegmez S , Bruno G , Castello R , Ceard L , Delaere C , du Pree T , Favart D , Forthomme L , Giammanco A , Hollar J , Lemaitre V , Liao J , Militaru O , Nuttens C , Pagano D , Pin A , Piotrzkowski K , Schul N , Garcia JMV , Beliy N , Caebergs T , Daubie E , Hammad GH , Alves GA , Martins MC , Damiao DD , Martins T , Pol ME , Souza MHG , Alda WL , Carvalho W , Custodio A , Da Costa EM , Martins CD , De Souza SF , Figueiredo DM , Mundim L , Nogima H , Oguri V , Da Silva WLP , Santoro A , Jorge LS , Sznajder A , Bernardes CA , Dias FA , Tomei TRFP , Gregores EM , Lagana C , Marinho F , Mercadante PG , Novaes SF , Padula SS , Genchev V , Iaydjiev R , Piperov S , Rodozov M , Stoykova S , Sultanov G , Tcholakov V , Trayanov R , 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 J , Wang X , Wang Z , Xiao H , Xu M , Zang J , Zhang Z , Asawatangtrakuldee C , Ban Y , Guo S , Guo Y , Li W , Liu S , Mao Y , Qian SJ , Teng H , Wang D , Zhang L , Zhu B , Zou W , Avila C , Gomez JP , Moreno BG , Oliveros AFO , Sanabria JC , Godinovic N , Lelas D , Plestina R , Polic D , Puljak I , Antunovic Z , Kovac M , Brigljevic V , Duric S , Kadija K , Luetic J , Morovic S , Attikis A , Galanti M , Mavromanolakis G , Mousa J , Nicolaou C , Ptochos E , Razis PA , Finger M , Finger M , Assran Y , Elgammal S , Kamel AE , Khalil S , Mahmoud MA , Radi A , Kadastik M , Muntel M , Raidal M , Rebane L , Tiko A , Eerola P , Fedi G , Voutilainen M , Harkonen J , Heikkinen A , 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 , Ungaro D , Wendland L , Banzuzi K , Karjalainen A , Korpela A , Tuuva T , Besancon M , Choudhury S , Dejardin M , Denegri D , Fabbro B , Faure JL , Ferri F , Ganjour S , Givernaud A , Gras P , de Monchenault GH , Jarry R , Locci E , Malcles J , Millischer L , Nayak A , Rander J , Rosowsky A , Shreyber I , Titov M , Baffioni S , Beaudette F , Benhabib L , Bianchini L , Bluj M , Broutin C , Busson P , Chariot C , Daci N , Dahms T , Dobrzynski L , de Cassagnac RG , Haguenauer M , Mine P , Mironov C , Nguyen M , Ochando C , Paganini P , Sabes D , Salerno R , Sirois Y , Veelken C , Zabi A , Agram JL , Andrea J , Bloch D , Bodin D , Brom JM , Cardaci M , Chabert EC , Collard C , Conte E , Drouhin F , Ferro C , Fontaine JC , Gele D , Goerlach U , Juillot P , Le Bihan AC , Van Hove P , Fassi F , Mercier D , Beauceron S , Beaupere N , Bondu O , Boudoul G , Chasserat J , Chierici R , Contardo D , Depasse P , El Mamouni H , Fay J , Gascon S , Gouzevitch M , Ille B , Kurca T , Lethuillier M , Mirabito L , Perries S , Sordini V , Tosi S , Tschudi Y , Verdier P , Viret S , Tsamalaidze Z , Anagnostou G , Beranek S , Edelhoff M , Feld L , Heracleous N , Hindrichs O , Jussen R , Klein K , Merz J , Ostapchuk A , Perieanu A , Raupach E , Sammet J , Schael S , Sprenger D , Weber H , Wittmer B , Zhukov V , Ata M , Caudron J , Dietz-Laursonn E , Duchardt D , Erdmann M , Fischer R , Guth A , Hebbeker T , Heidemann C , Ho

Titolo volume/Rivista

PHYSICS LETTERS. SECTION B

Anno di pubblicazione

2013

ISSN

0370-2693

ISBN

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Numero di citazioni Wos

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