arXiv subjects

Margarete Mühlleitner

Publications and source records attributed to Margarete Mühlleitner.

57 records · Page 4Linked to original sources

arXiv2009

MSSM Higgs Boson Production via Gluon Fusion: The Large Gluino Mass Limit

Scalar MSSM Higgs boson production via gluon fusion gg -> h,H is mediated by heavy quark and squark loops. The higher order QCD corrections to these processes turn out to be large. The full supersymmetric QCD corrections have been calculated recently. In the limit of large SUSY masses a conceptual problem appears, i.e. the proper treatment of the large gluino mass limit. In this work we will describe the consistent decoupling of heavy gluino effects and derive the effective Lagrangian for decoupled gluinos.

hep-ph↗

arXiv2007

Higgs Boson Production via Gluon Fusion: Squark Loops at NLO QCD

The loop-induced processes gg -> 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 O(20%). In addition we derive the QCD corrections to the squark contributions of the rare photonic Higgs decays h,H -> gamma gamma, which play a role for the Higgs searches at the LHC.

hep-ph↗

arXiv2003

A Note on Doubly-Charged Higgs Pair Production at Hadron Colliders

We analyze the next-to-leading order QCD corrections to the production of doubly-charged Higgs particles at hadron colliders in extensions of the SM with Higgs isospin triplets. At both the Tevatron and the LHC, these corrections are found to be moderate in size increasing the cross sections by about 20--30%. The residual theoretical uncertainties are of the order of 10--15% which is sufficient for experimental searches for these particles at the Tevatron and LHC.

hep-ph↗