Light-Fermion contribution to Higgs production and decays

por Roberto Bonciani (U. Freiburg)

viernes 20 may. 2005 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

The search for the Higgs boson is one of the main objective of the future Large Hadron Collider. The dominant Higgs production mechanism will be the gluon fusion and a particularly suitable channel for the search of the Higgs in the so-called intermediate mass region, $114 \leq m_H \leq 160$ GeV, will be the rare decay $H \to \gamma \gamma$. A theoretical knowledge of these processes at the NLO is mandatory for the achievement of the accuracy needed for comparison with the experiments. Recently the complete set of NLO electro-weak corrections to $gg \to H$ and $H \to \gamma \gamma$ were evaluated. The calculation is reviewed, giving particular attention to the set of EW corrections due to the light fermions, that numerically constitute the most sizable one. The method used for the calculation (reduction to the master integrals and their integration via differential equations) is also discussed.