The European Physical Journal C > 2016 > 76 > 12 > 1-24
Measurement of the $$b\overline{b}$$ b b ¯ dijet cross section in pp collisions at $$\sqrt{s} = 7$$ s = 7 TeV with the ATLAS detector
Source
Abstract
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 $$\sqrt{s} = 7$$ s = 7 TeV, using the ATLAS detector at the LHC. The data used correspond to an integrated luminosity of $$\mathrm 4.2\,\text {fb}^{-1}$$ 4.2 fb - 1 . The cross section is measured for events with two identified b-jets with a transverse momentum $$p_{\text {T}} > 20$$ p T > 20 GeV and a minimum separation in the $$\eta $$ η – $$\phi $$ ϕ plane of $$\Delta R = 0.4$$ Δ R = 0.4 . At least one of the jets in the event is required to have $$p_{\text {T}} > 270$$ p T > 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.
Identifiers
journal ISSN : | 1434-6044 |
journal e-ISSN : | 1434-6052 |
DOI | 10.1140/epjc/s10052-016-4521-y |