Diphoton production in gluon fusion at small transverse momentum

Details Diphoton production in gluon fusion at small transverse momentum Diphoton production in gluon fusion at small transverse momentum

2002-11-26

arxiv.org/abs/hep-ph/0211398v2

Phys.Lett.B558:63-68,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 figures; minor changes, additional reference

Scientific paper

10.1016/S0370-2693(03)00218-1

We discuss the production of photon pairs in gluon-gluon scattering in the context of the position-space resummation formalism at small transverse momentum. We derive the remaining unknown coefficients that arise at $O(\alpha_S)$, as well as the remaining $O(\alpha_S^2)$ coefficient that occurs in the Sudakov factor. We comment on the impact of these coefficients on the normalization and shape of the resummed transverse momentum distribution of photon pairs, which comprise an important background to Higgs boson production at the LHC.

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