Ponente
Jonathan Lewis
(Fermilab)
Descripción
CDF has performed a measurement of the B_c production cross section times branching fraction for B_c -> J/psi mu^+ nu relative to the B+ production cross section times branching fraction for B+ -> J/psi K^+. The measurement is based on the complete CDF Run II data set consisting of an integrated luminosity of 8.7 fb^-1. A sample of 1370 events is selected in which a J/psi decay to two muons is matched with a third muon. Background contributions of 630+/-14 events from misidentified J/psi, misidentified muons, other B_c decay modes, and decay products of other b-hadrons are estimated using data and PYTHIA Monte Carlo samples. The ratio of the production cross section times branching fraction of B_c -> J/psi mu^+ nu relative to B+->J/psi K^+ for p_T>6 GeV/c and |y|<0.6 is 0.211+/-0.012(stat)^{+0.021}_{-0.020}(sys)
Autor primario
Jonathan Lewis
(Fermilab)
