22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Measurement of beauty photoproduction using decays into muons in dijet events at HERA

22 Jul 2010, 17:30
Salle 242 ()

Salle 242

Parallel Session Talk 05 - Heavy Quarks Properties (experiment and theory) 05 - Heavy Quarks Properties (experiment and theory)


Achim Geiser (Fachbereich Physik)


Beauty photoproduction in dijet events has been measured at HERA with the ZEUS detector using an integrated luminosity of 126 pb-1. Beauty was identified in events with a muon in the final state by using the transverse momentum of the muon relative to the closest jet. Lifetime information from the silicon vertex detector was also used; the impact parameter of the muon with respect to the primary vertex was exploited to discriminate between signal and background. Cross sections for beauty production as a function of the muon and the jet variables as well as dijet correlations are compared to QCD predictions and to previous measurements. The data are well described by predictions from next-to-leading-order QCD.

Primary author

Dr Tobias Haas (DESY)


Achim Geiser (Fachbereich Physik) Dr Burkard Reisert (Max-Planck Institut für Physik München) Prof. Enrico Tassi (Universita della Calabria)

Presentation Materials