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

ATLAS; F. MONTICELLI

EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS

SPRINGER

Lugar: Berlin; Año: 2016

1434-6044

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 s√=7  TeV, using the ATLAS detector at the LHC. The data used correspond to an integrated luminosity of 4.2fb−1 . The cross section is measured for events with two identified b-jets with a transverse momentum pT>20  GeV and a minimum separation in the η ? ϕ plane of ΔR=0.4 . At least one of the jets in the event is required to have pT>270  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.