Title




Frequentist analysis of the parameter space of minimal supergravity
 
Author




 
Abstract




We make a frequentist analysis of the parameter space of minimal supergravity (mSUGRA), in which, as well as the gaugino and scalar soft supersymmetrybreaking parameters being universal, there is a specific relation between the trilinear, bilinear and scalar supersymmetrybreaking parameters, A 0=B 0+m 0, and the gravitino mass is fixed by m 3/2=m 0. We also consider a more general model, in which the gravitino mass constraint is relaxed (the VCMSSM). We combine in the global likelihood function the experimental constraints from lowenergy electroweak precision data, the anomalous magnetic moment of the muon, the lightest Higgs boson mass M h , B physics and the astrophysical cold dark matter density, assuming that the lightest supersymmetric particle (LSP) is a neutralino. In the VCMSSM, we find a preference for values of m 1/2 and m 0 similar to those found previously in frequentist analyses of the constrained MSSM (CMSSM) and a model with common nonuniversal Higgs masses (NUHM1). On the other hand, in mSUGRA we find two preferred regions: one with larger values of both m 1/2 and m 0 than in the VCMSSM, and one with large m 0 but small m 1/2. We compare the probabilities of the frequentist fits in mSUGRA, the VCMSSM, the CMSSM and the NUHM1: the probability that mSUGRA is consistent with the present data is significantly less than in the other models. We also discuss the mSUGRA and VCMSSM predictions for sparticle masses and other observables, identifying potential signatures at the LHC and elsewhere. 
 
Language




English
 
Source (journal)




European physical journal : C : particles and fields.  Berlin
 
Publication




Berlin
:
2011
 
ISSN




14346044
14346052
 
Volume/pages




71
:3
(2011)
, p. 1583,11583,14
 
Article Reference




1583
 
ISI




000287850600003
 
Medium




Eonly publicatie
 
Full text (Publisher's DOI)




 
