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
 
Volume/pages 



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



1583
 
ISI 



000287850600003
 
Medium 



Eonly publicatie
 
Full text (Publishers DOI) 


  
