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

Abstract.

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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Received: 7 February 2005, Revised: 26 April 2005, Published online: 31 May 2005

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Measurement of beauty production at HERA using events with muons and jets. Eur. Phys. J. C 41, 453–467 (2005). https://doi.org/10.1140/epjc/s2005-02267-0

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Keywords

  • Field Theory
  • Elementary Particle
  • Quantum Field Theory
  • Production Cross
  • Large Mass