Measurement of the differential $\gamma+2~b$-jet cross section and the ratio $\sigma$($\gamma+2~b$-jets)/$\sigma$($\gamma+b$-jet) in $p\bar{p}$ collisions at $\sqrt{s}$=1.96 TeV - Archive ouverte HAL Access content directly
Journal Articles Physics Letters B Year : 2014

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

, (1) , (1) , (1) , (2) , (3) , (3) , (3) , (1) , (1) , (2) , (1) , (4) , (4) , (4) , (4) , (5) , (5) , (6) , (6) , (6) , (6) , (6) , (6) , (6) , (7) , (7)
1
2
3
4
5
6
7
V.M. Abazov
E. Kajfasz

Abstract

We present the first measurements of the differential cross section $d\sigma/dp_{T}^{\gamma}$ for the production of an isolated photon in association with at least two $b$-quark jets. The measurements consider photons with rapidities $|y^\gamma| < 1.0$ and transverse momenta $30 < p_{T}^{\gamma} < 200$~\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 $\gamma+2~b$-jets to $\gamma+b$-jet as a function of $p_{T}^{\gamma}$ 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.

Dates and versions

in2p3-00991794 , version 1 (16-05-2014)

Identifiers

Cite

V.M. Abazov, G. Bernardi, D. Brown, Y. Enari, S. Greder, et al.. Measurement of the differential $\gamma+2~b$-jet cross section and the ratio $\sigma$($\gamma+2~b$-jets)/$\sigma$($\gamma+b$-jet) in $p\bar{p}$ collisions at $\sqrt{s}$=1.96 TeV. Physics Letters B, 2014, 737, pp.357-365. ⟨10.1016/j.physletb.2014.09.007⟩. ⟨in2p3-00991794⟩
59 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More