Measurement of the b-hadron production cross section using decays to D*(+)mu X- final states in pp collisions at root s=7 TeV with the ATLAS detector


Aad G., Abbott B., Aballah J., Khalek S. A. , Abdelalim A. A. , Abdinov O., ...More

NUCLEAR PHYSICS B, vol.864, no.3, pp.341-381, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 864 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1016/j.nuclphysb.2012.07.009
  • Title of Journal : NUCLEAR PHYSICS B
  • Page Numbers: pp.341-381
  • Keywords: QCD, Flavour physics, B physics, Heavy quark production, FRAGMENTATION, MODEL

Abstract

The b-hadron production cross section is measured with the ATLAS detector in pp collisions at root s = 7 TeV, using 3.3 pb(-1) of integrated luminosity, collected during the 2010 LHC run. The b-hadrons are selected by partially reconstructing D*(+)mu X- final states. Differential cross sections are measured as functions of the transverse momentum and pseudorapidity. The measured production cross section for a b-hadron with p(T) > 9 GeV and vertical bar eta vertical bar < 2.5 is 32.7 +/- 0.8(stat.)(-6.8)(+4.5)(syst.) mu b, higher than the next-to-leading-order QCD predictions but consistent within the experimental and theoretical uncertainties. Published by Elsevier B.V.