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

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

2009-01-15

arxiv.org/abs/0901.2226v2

JHEP 0904:133,2009

Physics

High Energy Physics

High Energy Physics - Experiment

19 pages, 5 figures, 4 tables Clarifications made in text, revisions made to theoretical prediction for total cross section an

Scientific paper

10.1088/1126-6708/2009/04/133

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.

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