Friday, October 12, 2012

1210.3331 (Shehu S. AbdusSalam et al.)

Higgs boson discovery versus sparticles prediction: Impact on the
pMSSM's posterior samples from a Bayesian global fit
   [PDF]

Shehu S. AbdusSalam, Debajyoti Choudhury
The signal strength of the recently discovered Higgs boson-like particle in the diphoton channel seemingly constrains physics beyond the standard model to a severe degree. However, the reported signal strength is prone to possible underestimation of uncertainties. We propose a discriminant that is relatively free of many of the theoretical uncertainties, and use this to gauge the impact on the phenomenological MSSM. A Bayesian global fit to all the pre-LHC data results in posterior distributions for the masses that are neither very restrictive, nor sufficiently prior-independent (except for the Higgs and stop masses). The imposition of the Higgs data, on the other hand, yields interesting and nearly prior-independent constraints. In particular, the existence of some light superpartners is favoured.
View original: http://arxiv.org/abs/1210.3331

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