Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at root s=7 TeV

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Abstract

The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at root s = 7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity of 5.0 fb(-1), recorded by the CMS detector at the LHC in 2011. The measurement is performed in two independent channels through a trilepton analysis of t (t) over barZ events and a same-sign dilepton analysis of t (t) over barV (V = W or Z) events. In the trilepton channel a direct measurement of the t (t) over barZ cross section sigma(t (t) over barZ) = 0.28(-0.11)(+0.14) (stat)(-0.03)(+0.06) (syst) pb is obtained. In the dilepton channel a measurement of the t (t) over barV cross section yields sigma(t (t) over barV) = 0.43(-0.15)(+0.17) (stat)(-0.07)(+0.09) (syst) pb. These measurements have a significance, respectively, of 3.3 and 3.0 standard deviations from the background hypotheses and are compatible, within uncertainties, with the corresponding next-to-leading order predictions of 0.137(-0.016)(+0.012) and 0.306(-0.053)(+0.031) pb. DOI: 10.1103/PhysRevLett.110.172002

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  • Chatrchyan S , Khachatryan V , Sirunyan AM , Tumasyan A , Adam W , Aguilo E , Bergauer T , Dragicevic M , Ero J , Fabjan C , Friedl M , Fruhwirth R , Ghete VM , Hormann N , Hrubec J , Jeitler M , Kiesenhofer W , Knunz V , Krammer M , Kraetschmer I , Liko D , Mikulec I , Pernicka M , Rabady D , Rahbaran B , Rohringer C , Rohringer H , Schofbeck R , Strauss J , Taurok A , Waltenberger W , Wulz CE , Mossolov V , Shumeiko N , Gonzalez JS , Alderweireldt S , Bansal M , Bansal S , Cornelis T , De Wolf EA , Janssen X , Luyckx S , Mucibello L , Ochesanu S , Roland B , Rougny R , Selvaggi M , 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 , Tavernier S , Van Doninck W , Van Mulders P , Van Onsem GP , Villella I , Clerbaux B , De Lentdecker G , Dero V , Gay APR , Hreus T , Leonard A , Marage PE , Mohammadi A , Reis T , Thomas L , Vander Velde C , 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 , Sigamani M , Strobbe N , Thyssen F , Tytgat M , 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 , 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 , Jorge LS , Sznajder A , Manganote EJT , Pereira AV , Anjos TS , Bernardes CA , Dias FA , Tomei TRFP , Gregores EM , Lagana C , Marinho F , Mercadante PG , Novaes SF , Padula SS , Genchev V , Iaydjiev P , 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 Y , Li Q , Li W , Liu S , Mao Y , Qian SJ , Wang D , Zhang L , Zou W , Avila C , Montoya CAC , 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 , Mekterovic D , Morovic S , Tikvica L , Attikis A , Galanti M , Mavromanolakis G , Mousa J , Nicolaou C , Ptochos F , Razis PA , Finger M , Finger M , Assran Y , Elgammal S , Kamel AE , Awad AMK , Mahmoud MA , Radi A , Kadastik M , Muentel M , Murumaa 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 , Korpela A , Tuuva T , Besancon M , Choudhury S , 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 , Bianchini 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 , Bodin D , Brom JM , Cardaci M , Chabert EC , Collard C , Conte E , Drouhin F , Fontaine JC , Gele D , Goerlach U , Juillot P , Le Bihan AC , Van Hove P , Beauceron S , Beaupere N , Bondu O , Boudoul G , Brochet S , 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 , Sgandurra L , Sordini V , Tschudi Y , Verdier P , Viret S , Tsamalaidze Z , Autermann C , Beranek S , Calpas B , Edelhoff M , Feld L , Heracleous N , Hindrichs O , Jussen R , Klein K , Merz J , Ostapchuk A , Perieanu A , Raupach F , Sammet J , Schael S , Sprenger D , Weber H , Wittmer B , Zhuk

Titolo volume/Rivista

PHYSICAL REVIEW LETTERS

Anno di pubblicazione

2013

ISSN

0031-9007

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