# top physics: measurement of the ttbar production cross section in pp-bar collisions at sqrt s = 1.96 tev using lepton plus jets events with semileptonic b decays to muons

Acosta, D. ; Collaboration, The CDF

Lawrence Berkeley National Laboratory

关键词: Decay;    Transverse Momentum;    43 Particle Accelerators;    Electrons;    Semileptonic Decay;   

DOI  :  10.2172/842924
RP-ID  :  LBNL--58137
RP-ID  :  AC03-76SF00098
RP-ID  :  842924

美国|英语

来源: UNT Digital Library

【 摘 要 】

We present a measurement of the t{bar t} production cross section using 194 pb{sup -1} of CDF II data using events with a high transverse momentum electron or muon, three or more jets, and missing transverse energy. The measurement assumes 100% t {yields} Wb branching fraction. Events consistent with t{bar t} decay are found by identifying jets containing heavy flavor semileptonic decays to muons. The dominant backgrounds are evaluated directly from the data. Based on 20 candidate events and an expected background of 9.5 {+-} 1.1 events, we measure a production cross section of 5.3 {+-} 3.3{sub -1.0}{sup +1.3} pb, in agreement with the standard model.