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MSSM neutral Higgs WG meeting
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Minutes of the Meeting of the MSSM neutral group on June 17th 2010
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The status of the different cross section calculations was discussed
b-associated production, 5-flavor scheme (MW):
Grids for SM-like Higgs bosons are ready, everything complete for MSTW2008 including PDF+alphas uncertainty. This calculation is NNLO and instead of comparing to CTEQ, numbers using AMBK and JR09 PDFs will be made for the CERN workshop
b-associated production, 4-flavor scheme (MS):
Jobs for SM-like grids are running, main limitation is the huge CPU time needed. It is expected to have results for MSTW2008 ready for the CERN workshop, inclusing scale uncertainties. Although possible ways to also make the PDF uncertainties it turned out that this is not possible, as the calculation needs a 4-flavor PDF and for this no error PDFs are available (also the 4-flavor version alone is based on a private version)
gluon-gluon-Fusion:
Monica is in the process of finishing the numbers for ggF including scale uncertainties, PDF and PDF+alphas uncertainties using MSTW2008. This uses the approach presented in Freiburg, using HIGLU and ggh@nnlo.
In addition numbers were made by Artur using Feynhiggs2.7, which contains significant bug-fixes for the recalculation of this cross section. These numbers will be compared to the ggF numbers for the CERN workshop.
As there is a large amount of cross-feed between the MSSM neutral Higgs group and the BR group, there was a proposal to have a joint discussion session at the CERN workshop. For example differences in the cross section when changing the sign of mu can be large, but will be compensated to a large part (in the tautau channel) by a change in the BRs. Also it was stressed that in the parameter space explored so far the Higgs width can be large compared to the SM and interference effects might be important.
The next meeting was decided to be held on the 1st of July.
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