Speaker
Dr
Michael Spira
(PSI)
Description
The loop-induced processes $gg\to h,H,A$ provide the dominant Higgs
boson production mechanisms at the Tevatron and LHC in a large range of
the minimal supersymmetric extension of the Standard Model. For squark
masses below $\sim 400$ GeV squark loop contributions become important
in addition to the top and bottom quark loops. The next-to-leading
order QCD corrections to the squark contributions of these processes are
determined including the full squark and Higgs mass dependences. They
turn out to be large and thus important for the Tevatron
and LHC experiments. Squark mass effects of the $K$ factors can be of
${\cal O}(20\%)$. In addition we derive the QCD corrections to the
squark contributions of the rare photonic Higgs decays $h,H\to
\gamma\gamma$, which play a role for the Higgs searches at the LHC.
Author
Dr
Michael Spira
(PSI)
Co-author
Dr
Margarete Muehlleitner
(LAPTH Annecy)
