Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass

Abstract

The production of beauty and charm quarks in ep interactions has been studied with the ZEUS detector at HERA for exchanged four-momentum squared 5 < Q^2 < 1000 GeV^2 using an integrated luminosity of 354 pb^{-1}. The beauty and charm content in events with at least one jet have been extracted using the invariant mass of charged tracks associated with secondary vertices and the decay-length significance of these vertices. Differential cross sections as a function of Q^2, Bjorken x, jet transverse energy and pseudorapidity were measured and compared with next-to-leading-order QCD calculations. The beauty and charm contributions to the proton structure functions were extracted from the double-differential cross section as a function of x and Q^2. The running beauty-quark mass, m_b at the scale m_b, was determined from a QCD fit at next-to-leading order to HERA data for the first time and found to be 4.07 \pm 0.14 (fit} ^{+0.01}_{-0.07} (mod.) ^{+0.05}_{-0.00} (param.) ^{+0.08}_{-0.05} (theo) GeV.

63 pages, 14 figures, 20 tables. Version accepted by JHEP

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Cited by in corpus (15)

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• The impact of the LHC Z-boson transverse momentum data on PDF determinations
• Running of the Charm-Quark Mass from HERA Deep-Inelastic Scattering Data
• Impact of the heavy quark matching scales in PDF fits
• Transverse momentum dependent parton densities in processes with heavy quark generations
• Towards the global fit of the TMD gluon density in the proton from the LHC data
• Application of the rescaling model at small Bjorken $x$ values
• Charm Production and QCD Analysis at HERA and LHC
• Charm, Beauty and Top at HERA
• Importance of the heavy-quarks longitudinal structure function measurements at future circular collider energies
• Influence of gluon behavior on heavy-quark pair production
• Probing nuclear gluons with heavy quarks at EIC
• Implementation of target mass corrections and higher-twist effects in the xFitter framework
• Heavy quarks structure functions $F_2^{q\bar{q}}(x,Q^2)$ and $F_L^{q\bar{q}}(x,Q^2)$ at the NLO approximation
• Nonlinear corrections to the nuclear heavy flavor structure functions