Journal article
Measurement of open beauty production in photoproduction at HERA
The European physical journal. C, Particles and fields, Vol.18(4), pp.625-637
01/01/2001
DOI: 10.1007/s100520100571
Abstract
The production and semi-leptonic decay of heavy quarks have been studied in the photoproduction process e(+)p -> e(+) + dijet + e(-) + X with the ZEUS detector st HERA using an integrated luminosity of 38.5 pb(-1). Events with photon-proton centre-of-mass energies, W-gammap, between 134 and 289 GeV and a photon virtuality, Q(2), less than 1 GeV2 were selected requiring at least two jets of transverse energy E-T(jet(2)) > 7(6) GeV and an electron in the final state. The electrons were identified by employing the ionisation energy loss measurement. The contribution of beauty quarks was determined using the transverse momentum of the electron relative to the axis of the closest jet, p(T)(rol). The data, after background subtraction, were fit with a Monte Carlo simulation including beauty and charm decays, The measured beauty cross section was extrapolated to the parton level with the b quark restricted to the region of tranverse momentum p(T)(b) > p(T)(min) = 5 GeV and pseudorapidity \ eta (b)\ < 2 The extrapolated cross section is 1.6 +/- 0.4 (stat.)(-0.5)(+0.3), (syst.)(-0.4)(+0.2) (ext.) nb. The result is compared to a perturbative QCD calculation performed to next-to-leading order.
Details
- Title: Subtitle
- Measurement of open beauty production in photoproduction at HERA
- Creators
- ZEUS CollaborationJ Repond (Contributor)
- Resource Type
- Journal article
- Publication Details
- The European physical journal. C, Particles and fields, Vol.18(4), pp.625-637
- DOI
- 10.1007/s100520100571
- ISSN
- 1434-6044
- eISSN
- 1434-6052
- Publisher
- Springer Nature
- Number of pages
- 13
- Language
- English
- Date published
- 01/01/2001
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627289002771
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