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DOI: 10.1103/physrevd.86.075010
¤ OpenAccess: Green
This work has “Green” OA status. This means it may cost money to access on the publisher landing page, but there is a free copy in an OA repository.

Constrained MSSM favoring new territories: The impact of new LHC limits and a 125 GeV Higgs boson

Andrew Fowlie,Małgorzata Kazana,Kamila Kowalska,Shoaib Munir,Leszek Roszkowski,Enrico Maria Sessolo,Sebastian Trojanowski,Yue-Lin Sming Tsai

Higgs boson
Particle physics
Physics
2012
We present an updated and extended global analysis of the Constrained MSSM (CMSSM) taking into account new limits on supersymmetry from ~5/fb data sets at the LHC. In particular, in the case of the razor limit obtained by the CMS Collaboration we simulate detector efficiency for the experimental analysis and derive an approximate but accurate likelihood function. We discuss the impact on the global fit of a possible Higgs boson with mass near 125 GeV, as implied by recent data, and of a new improved limit on BR(B_s->\mu\mu). We identify high posterior probability regions of the CMSSM parameters as the stau-coannihilation and the A-funnel region, with the importance of the latter now being much larger due to the combined effect of the above three LHC results and of dark matter relic density. We also find that the focus point region is now disfavored. Ensuing implications for superpartner masses favor even larger values than before, and even lower ranges for dark matter spin-independent cross section, \sigma^{SI}_p<10^{-9} pb. We also find that relatively minor variations in applying experimental constraints can induce a large shift in the location of the best-fit point. This puts into question the robustness of applying the usual chisquare approach to the CMSSM. We discuss the goodness-of-fit and find that, while it is difficult to calculate a p-value, the g-2 constraint makes, nevertheless, the overall fit of the CMSSM poor. We consider a scan without this constraint, and we allow \mu\ to be either positive or negative. We find that the global fit improves enormously for both signs of \mu, with a slight preference for \mu<0 caused by a better fit to BR(b->s\gamma) and BR(B_s->\mu\mu).
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    Constrained MSSM favoring new territories: The impact of new LHC limits and a 125 GeV Higgs boson” is a paper by Andrew Fowlie Małgorzata Kazana Kamila Kowalska Shoaib Munir Leszek Roszkowski Enrico Maria Sessolo Sebastian Trojanowski Yue-Lin Sming Tsai published in 2012. It has an Open Access status of “green”. You can read and download a PDF Full Text of this paper here.