MSSM neutral Higgs meeting

Thursday 11 Feb 2010, 15:00 → 16:00 Europe/Zurich

CERN

Georg Weiglein (DESY), Markus Warsinsky (Physikalisches Institut, Albert-Ludwigs-Universität Freiburg), Michael Spira (PSI), Monica Vazquez Acosta (Imperial College London)

EVO ---------------------------------------------------------------------------------------------------------------------- Title: LHC Higgs: MSSM neutral Higgs Description: Kick-off meeting of the MSSM neutral Higgs group Community: Universe - Meeting URL http://evo.caltech.edu/evoGate/koala.jnlp?meeting=MIM9Ms2M2nDaDt929uDa9I - Phone Bridge ID: 1625451

15:00 → 16:00 Kick-off discussion

Speaker: All

Tasks for Freiburg
==================

- The most important cross sections for producing neutral MSSM Higgs
   bosons are gg,qq -> bb + phi (radiation off a b quark, particularly
   important for large tan_beta), gg -> phi (gluon fusion) and
   WBF (weak boson fusion). To a lesser extent, tt phi production and
   W phi production (Higgsstrahlung) can play a role. Furthermore, in the
   MSSM there can be additional production modes that are not present in
   the SM, like Higgs production in the decay of supersymmetric
   particles.

   For Freiburg, the aim is to start producing numbers (at least) for
   gg -> phi and gg,qq -> bb + phi.

- Numbers shall be generated as grids for the scalar and pseudoscalar
   processes (HIGLU: tt, bb, tb separately) for later interpolation.
   Grid spacing: 80-200 GeV with steps of 5 GeV
              200-1000 GeV with steps of 20 GeV

- Pure QCD corrections can be included in the grids.
   Genuine SUSY-QCD corrections depend on the MSSM scenario.
   Electroweak corrections are not available for MSSM Higgs bosons in
   gluon fusion and bremsstrahlung.
   Alternative numbers for bb -> phi will be generated in the SM
   at NNLO QCD and in the MSSM including NLO QCD and NLO electroweak
   corrections (--> need to contact Alexander Mueck to get numbers
   from him).

- The aim is (to be discussed at Freiburg and carried on afterwards)
   is to investigate how to make best use of the available results for
   the SM in order to arrive at the most reliable predictions for the
   MSSM. This will involve also comparisons of different MSSM codes
   for Higgs masses, etc.

- PDFs: MSTW2008 (there is a private copy of 4-flavour PDFs)
          The values of alpha_s are to be adjusted to these PDFs.

- MSSM scenario: start with MHmax scenario, then probably consider
                  the no-mixing scenario next.
                  tan(beta) in the range 5-60 (exact range can be
                  decided later)

- Energy: 7 TeV

- masses and other parameters were discussed and the discussed values happened to coincide with those published on the SM input parameters twiki page.

- Higgs mass calculations and branching ratios should be generated in
    collaboration with the BRs subgroup.