On the Resummation of Large QCD Logarithms in Higgs -> 2 Photons Decay

Details On the Resummation of Large QCD Logarithms in Higgs -> 2 Photons Decay On the Resummation of Large QCD Logarithms in Higgs -> 2 Photons Decay

2001-02-08

arxiv.org/abs/hep-ph/0102105v2

Phys.Rev. D64 (2001) 113008

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LaTeX, 5 Postscript Figures, version published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.64.113008

We study the strong corrections to the Higgs coupling to two photons. This coupling is the dominant mechanism for Higgs production in photon-photon collisions. In addition, the two photon decay mode of the Higgs is an important and relatively background free channel of relevance at the LHC and the Tevatron. We develop a method for the resummation of large QCD corrections in the form of Sudakov-like logarithms of the type \alpha_s^n\ln^{2n}(m/m_H) and \alpha_s^n\ln^{2n-1}(m/m_H) (where m is the light quark mass) which can contribute to this process in certain models (for example, the MSSM for large tan \beta) up to next-to-leading-logarithmic (NLL) accuracy. The NLL correction is moderate, the substantial part of which comes from terms not related to running coupling effects.

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