Measurement of b-hadron pair production with the ATLAS detector in proton-proton collisions at root s=8 TeV


Aaboud M., Aad G., Abbott B., Abdallah J., Abdinov O., Abeloos B., ...More

JOURNAL OF HIGH ENERGY PHYSICS, no.11, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2017
  • Doi Number: 10.1007/jhep11(2017)062
  • Journal Name: JOURNAL OF HIGH ENERGY PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: B physics, Hadron-Hadron scattering (experiments), PRODUCTION CROSS-SECTIONS, P(P)OVER-BAR COLLISIONS, PARTON DISTRIBUTIONS, QUARK PRODUCTION
  • Gazi University Affiliated: Yes

Abstract

A measurement of b-hadron pair production is presented, based on a data set corresponding to an integrated luminosity of 11.4 fb(-1) of proton-proton collisions recorded at root s = 8TeV with the ATLAS detector at the LHC. Events are selected in which a b-hadron is reconstructed in a decay channel containing J = psi -> mu mu, and a second b-hadron is reconstructed in a decay channel containing a muon. Results are presented in a fiducial volume de fined by kinematic requirements on three muons based on those used in the analysis. The fiducial cross section is measured to be 17.7 +/- 0.1(stat.) +/- 2.0(syst.) nb. A number of normalised differential cross sections are also measured, and compared to predictions from the PYTHIA8, HERWIG++, MADGRAPH5_AMC@NLO+PYTHIA8 and SHERPA event generators, providing new constraints on heavy flavour production.