Implications for the Constrained MSSM from a new prediction for b to s gamma

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Title: Implications for the Constrained MSSM from a new prediction for b to s gamma
Authors: Roszkowski, L
Austri, RRD
Trotta, R
Item Type: Journal Article
Abstract: We re-examine the properties of the Constrained MSSM in light of updated constraints, paying particular attention to the impact of the recent substantial shift in the Standard Model prediction for BR(B to X_s gamma). With the help of a Markov Chain Monte Carlo scanning technique, we vary all relevant parameters simultaneously and derive Bayesian posterior probability maps. We find that the case of mu>0 remains favored, and that for mu<0 it is considerably more difficult to find a good global fit to current constraints. In both cases we find a strong preference for a focus point region. This leads to improved prospects for detecting neutralino dark matter in direct searches, while superpartner searches at the LHC become more problematic, especially when mu<0. In contrast, prospects for exploring the whole mass range of the lightest Higgs boson at the Tevatron and the LHC remain very good, which should, along with dark matter searches, allow one to gain access to the otherwise experimentally challenging focus point region. An alternative measure of the mean quality-of-fit which we also employ implies that present data are not yet constraining enough to draw more definite conclusions. We also comment on the dependence of our results on the choice of priors and on some other assumptions.
Issue Date: 1-Jul-2007
ISSN: 1029-8479
Publisher: IOP Publishing
Start Page: 075
Journal / Book Title: JHEP
Volume: 0707
Copyright Statement: © SISSA 2007
Notes: JHEP version
Publisher URL:
Appears in Collections:Physics
Faculty of Natural Sciences

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