2014/05/31 by ZEUS collaboration, H. Abramowicz, I. Abt +185 · 1 citation
Physics and Astronomy · #Bottom quark #Charged particle #Charm (quantum number) #Charm quark #Deep inelastic scattering #HERA #High-Energy Particle Collisions Research #Inelastic scattering #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Scattering #Top quark #ZEUS (particle detector) #hep-ex
paper · pdf · doi:10.1007/jhep09(2014)127
63 pages, 14 figures, 20 tables. Version accepted by JHEP
openalex publication_date 2014/09/01 · arxiv created 2014/10/21 · arxiv updated 2014/10/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
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 GeV2 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 trans- verse 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 m b (m b ) = 4.07 ± 0.14 (fit) − 0.07 + 0.01 (mod.) − 0.00 + 0.05 (param.) − 0.05 + 0.08 (theo.) GeV.