TL;DR
This paper reports on measurements of open beauty production at HERA using novel lifetime and transverse momentum observables, providing new insights into beauty quark production in positron-proton collisions and comparing results with NLO QCD predictions.
Contribution
It introduces the first use of lifetime information at HERA to analyze beauty production, combining lifetime and transverse momentum signatures for the first time in deep inelastic scattering.
Findings
First observation of beauty production in deep inelastic scattering at HERA.
Agreement of measured cross sections with NLO QCD calculations.
Use of the H1 silicon vertex detector to analyze lifetime spectra.
Abstract
Recent results on open beauty production in positron-proton collisions at a centre-of-mass energy of 300 GeV are presented. The beauty photoproduction cross section is measured by ZEUS and H1 via the semileptonic decay. Both experiments use the transverse lepton momentum with respect to a jet as an observable. The H1 central silicon vertex detector makes it possible to analyse, in addition, the lepton impact parameter spectrum, thus exploiting lifetime information for the first time at HERA. The combined lifetime and transverse momentum signature is further used to observe beauty production for the first time in deep inelastic scattering. All results are compared with NLO QCD calculations.
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