One - loop gg → bb̄ effects in the main irreducible background to exclusive H → bb̄ production at the LHC
نویسنده
چکیده
We calculate the amplitude of gg → bb̄ production for the colour singlet, Jz = 0 di-gluon state at O(α2 S) 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 bb̄ cross section at the LHC. This process is essentially the only irreducible QCD background to the exclusive H → bb̄ signal.
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تاریخ انتشار 2008