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arXiv · 1405.3964

Measurement of the differential $γ+2~b$-jet cross section and the ratio $σ$($γ+2~b$-jets)/$σ$($γ+b$-jet) in $p\bar{p}$ collisions at $\sqrt{s}$=1.96 TeV

D0 Collaboration
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Abstract

We present the first measurements of the differential cross section $dσ/dp_{T}^γ$ for the production of an isolated photon in association with at least two $b$-quark jets. The measurements consider photons with rapidities $|y^γ| < 1.0$ and transverse momenta $30 < p_{T}^γ < 200$~\GeV. The $b$-quark jets are required to have $p_T^{jet}>15$ GeV and $| y^{jet}| < 1.5$. The ratio of differential production cross sections for $γ+2~b$-jets to $γ+b$-jet as a function of $p_{T}^γ$ is also presented. The results are based on the proton-antiproton collision data at $\sqrt{s}=$1.96~\TeV collected with the D0 detector at the Fermilab Tevatron Collider. The measured cross sections and their ratios are compared to the next-to-leading order perturbative QCD calculations as well as predictions based on the $k_{T}$-factorization approach and those from the SHERPA and PYTHIA Monte Carlo event generators.

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D0 Collaboration. 2014-05-15. Measurement of the differential $γ+2~b$-jet cross section and the ratio $σ$($γ+2~b$-jets)/$σ$($γ+b$-jet) in $p\bar{p}$ collisions at $\sqrt{s}$=1.96 TeV. https://doi.org/10.1016/j.physletb.2014.09.007

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