Measurement of beauty production at HERA using events with muons and jets

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The European Physical Journal C - Particles and Fields | 2005年 / 41卷
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Field Theory; Elementary Particle; Quantum Field Theory; Production Cross; Large Mass;
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A measurement of the beauty production cross section in ep collisions at a centre-of-mass energy of 319 GeV is presented. The data were collected with the H1 detector at the HERA collider in the years 1999-2000. Events are selected by requiring the presence of jets and muons in the final state. Both the long lifetime and the large mass of b-flavoured hadrons are exploited to identify events containing beauty quarks. Differential cross sections are measured in photoproduction, with photon virtualities Q2 < 1 GeV2, and in deep inelastic scattering, where 2 < Q2 < 100 GeV2. The results are compared with perturbative QCD calculations to leading and next-to-leading order. The predictions are found to be somewhat lower than the data.
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页码：453 / 467
页数：14
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