Abstract
Measurements are presented of the cross section for the production of at least four jets, of which at least two originate from b quarks, in proton-proton collisions. Data collected with the CMS detector at the LHC at a center-of-mass energy of 7 TeV are used, corresponding to an integrated luminosity of 3 pb−1. The cross section is measured as a function of the jet transverse momentum for pT > 20 GeV, and of the jet pseudorapidity for |η| < 2.4 (b jets), 4.7 (untagged jets). The correlations in azimuthal angle and pT between the jets are also studied. The inclusive cross section is measured to be σ(pp → 2b + 2j + X) = 69 ± 3(stat) ± 24(syst) nb. The η and pT distributions of the four jets and the correlations between them are well reproduced by event generators that combine perturbative QCD calculations at next-to-leading-order accuracy with contributions from parton showers and multiparton interactions.
Original language | English |
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Article number | 112005 |
Number of pages | 24 |
Journal | Physical Review D |
Volume | 94 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |
Keywords
- Double-parton scattering
- Partons
- Production