hMSSM discussion

14/4-002 (CERN)



Show room on map
Ian Low (Argonne National Lab/Northwestern Univ), Mario Pelliccioni (Universita e INFN (IT)), Milada Muehlleitner (Unknown), Nikolaos Rompotis (University of Washington (US))

hMSSM discussion conclusions:

The meeting had as target to discuss the range of validity of the hMSSM.
Pietro showed a comparison of FH vs 2HDM effective theory (EFT) vs hMSSM and
demonstrated that hMSSM tracks well FH at medium/high tanbeta.
Gabriel explained more the 2HDM EFT of the MSSM.

It is shown that hMSSM prediction is reliable as soon as mu << MS
and tanbeta > 2 - 2.5.
In the rest of the region the agreement with the EFT is at the % level.
For large mu the differences can be large, e.g. ~25% was shown for
the b coupling. The exact extent of the differences needs more study.

A question was raised referring to the case where only 2-fermion
decays are present and the couplings depend only on tanbeta, mH+ or mA.
Is for this case the results safe for low (= order 1) tanbeta region?
This is the case in the low mA, low mH+ searches for H/A->tautau and H+->taunu.
For this question two points were raised. The entire
MSSM is ill defined below tanbeta~2 and hence the connections
between the Higgs masses are spoiled. Besides, in the case of
a large top yukawa coupling, radiative corrections to
H+->t*b may get out of control and this can affect BR(H+->taunu).

There are minutes attached to this event. Show them.
    • 16:00 16:20
      Definition of hMSSM 20m
      Speakers: Abdelhak Djouadi (Universite de Paris-Sud 11 (FR)), Abdelhak Djouadi (LPT Orsay), Jeremie Quevillon (Universite de Paris-Sud 11 (FR))
    • 16:30 16:40
      Comparison of hMSSM with full MSSM 10m
      Speaker: Dr Pietro Slavich (Centre National de la Recherche Scientifique (FR))
    • 16:45 16:55
      TBA 10m
      Speakers: Carlos E.M. Wagner (University of Chicago), Gabriel Lee (University of Chicago)
    • 17:00 17:20
      Discussion 20m