The Di-Photon Background to a Light Higgs Boson at the LHC

Details The Di-Photon Background to a Light Higgs Boson at the LHC The Di-Photon Background to a Light Higgs Boson at the LHC

2002-11-14

arxiv.org/abs/hep-ph/0211216v1

Nucl.Phys.Proc.Suppl.116:178-182,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk at RADCOR 2002/Loops and Legs in Quantum Field Theory (September 2002, Kloster Banz, Germany)

Scientific paper

10.1016/S0920-5632(03)80165-2

Recent years have seen a significant advance in our ability to calculate two-loop matrix elements. In this talk we describe an application of this breakthrough to improve our understanding of the background to the search for a light Higgs boson at the LHC. In particular, we focus on the QCD corrections to the gluon fusion subprocess gg to gamma gamma, which forms an important component of the background in the di-photon channel. We find that the K factor for this subprocess is significantly smaller than estimated previously.

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