One-loop gg->bb(bar) effects in the main irreducible background to exclusive H->bb(bar) production at the LHC

Details One-loop gg->bb(bar) effects in the main irreducible background to exclusive H->bb(bar) production at the LHC One-loop gg->bb(bar) effects in the main irreducible background to exclusive H->bb(bar) production at the LHC

2008-06-09

arxiv.org/abs/0806.1447v1

Eur.Phys.J.C56:467-477,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 5 figures

Scientific paper

10.1140/epjc/s10052-008-0675-6

We calculate the amplitude of gg->bb(bar) production for the colour singlet, J_z=0 di-gluon state at O(\alpha_S^2) order. We consider the cancellation, and a realistic cutoff, of the infrared divergent terms. We show that the one-loop radiative QCD contributions effectively reduce the Born level result for the central exclusive bb(bar) cross section at the LHC. This process is essentially the only irreducible QCD background to the exclusive H->bb(bar) signal.

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