Inclusive b-jet and b\bar b-dijet production at the LHC via Reggeized gluons

Details Inclusive b-jet and b\bar b-dijet production at the LHC via Reggeized gluons Inclusive b-jet and b\bar b-dijet production at the LHC via Reggeized gluons

2012-01-23

arxiv.org/abs/1201.4640v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 6 figures

Scientific paper

We study inclusive b-jet and b\bar b-dijet production at the CERN LHC invoking the hypothesis of gluon Reggeization in $t$-channel exchanges at high energy. The transverse-momentum distributions of inclusive b-jet production measured with the ATLAS detector at the CERN LHC in different rapidity ranges are calculated both within multi-Regge kinematics and quasi-multi-Regge kinematics. The b\bar b-dijet cross-section is calculated as a function of the dijet invariant mass M_{jj}, the azimuthal angle between the two jets \delta\phi and the angular variable \chi. At the numerical calculation, we adopt the Kimber-Martin-Ryskin and Blumlein prescriptions to derive unintegrated gluon distribution function of the proton from their collinear counterpart, for which we use the Martin-Roberts-Stirling-Thorne set. Without adjusting any free parameters, we find good agreement with measurements by the ATLAS Collaboration at the LHC at the hadronic c.m. energy of \sqrt S=7 TeV.

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