MSSM: Cornered and correlated

Abstract

Inspired by the latest results of ATLAS and CMS on the search for the standard model (SM) Higgs scalar, we discuss in this article the correlations between Higgs-boson properties, low-energy observables, such as B → X sγ, B s → μ + μ -, and (g - 2)μ, and the dark matter (DM) relic density. We focus on the corners of the MSSM parameter space where the pp → h → γγ signal is enhanced due to the presence of a light stau state. In this region tan β, M A, A t, and μ take large values, and we find striking correlations between many of the considered observables. In particular, the B → X sγ branching fraction is enhanced, while the B s → μ + μ - rate tends to be below the SM expectation. In contrast, the Higgs-boson couplings show good overall agreement with the preliminary experimental determinations, the DM abundance is consistent with observation, and the discrepancy in (g - 2) μ is reduced. The predicted deviations and found correlations could be tested in the near future and hence may become very valuable as guidelines and consistency checks. © 2013 SISSA.