Measurement of the bb¯¯ dijet cross section in pp collisions at s√=7 TeV with the ATLAS detector

Open Access

Abstract

Ajuts: We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of MINECO, Spain and EPLANET, ERC, FP7, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union. Funded by SCOAP3. ; The dijet production cross section for jets containing a b -hadron (b -jets) has been measured in proton-proton collisions with a centre-of-mass energy of TeV, using the ATLAS detector at the LHC. The data used correspond to an integrated luminosity of . The cross section is measured for events with two identified b -jets with a transverse momentum GeV and a minimum separation in the - plane of . At least one of the jets in the event is required to have GeV. The cross section is measured differentially as a function of dijet invariant mass, dijet transverse momentum, boost of the dijet system, and the rapidity difference, azimuthal angle and angular distance between the b -jets. The results are compared to different predictions of leading order and next-to-leading order perturbative quantum chromodynamics matrix elements supplemented with models for parton-showers and hadronization.