4.7 Article

One-loop gg→b(b)over-bar effects in the main irreducible background to exclusive H→b(b)over-bar production at the LHC

Journal

EUROPEAN PHYSICAL JOURNAL C
Volume 56, Issue 4, Pages 467-477

Publisher

SPRINGER
DOI: 10.1140/epjc/s10052-008-0675-6

Keywords

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Funding

  1. INTAS [05-103-7515]
  2. RFBR [07-0200023]
  3. Russian State [RSGSS-5788.2006.02]
  4. STFC [ST/G000905/1] Funding Source: UKRI
  5. Science and Technology Facilities Council [ST/G000905/1] Funding Source: researchfish

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

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