Speaker
Prof.
Milada Margarete Muehlleitner
(Institute of Theoretical Physics (TP), Karlsruhe Institute of Technology)
Description
The MSSM scalar h and H production through gluon fusion is mediated by heavy
quark and squark loops at LO. The NLO QCD corrections at two loops to the
quark loops are known including mass effects since two decades, while those
to the squark loops have been derived some time ago in the heavy squark mass
limit first. However, for light stop masses below about 400 GeV, mass
effects can become important. Their inclusion in the NLO calculation implied
that they are of the order of 20% on top of the LO squark mass effects. In
the next step we have calculated the full two-loop SUSY-QCD corrections
including finite gluino and squark masses and mixing effects. The mass
effects turn out to be important. First results of the complete NLO
calculation within the MSSM shall be presented. The validity of
approximations used in the cross section calculation will be discussed in
view of these new results.
Primary authors
Dr
Heidi Rzehak
(University of Freiburg)
Dr
Michael Spira
(Paul Scherrer Institute)
Prof.
Milada Margarete Muehlleitner
(Institute of Theoretical Physics (TP), Karlsruhe Institute of Technology)