2015/03/04 by Ovrut, Burt A., Purves, Austin, Spinner, Sogee
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)
paper · doi:10.48550/arxiv.1503.01473
This paper introduces a random statistical scan over the high-energy initial parameter space of the minimal SUSY B-L model--denoted as the B-L MSSM. Each initial set of points is renormalization group evolved to the electroweak scale--being subjected, sequentially, to the requirement of radiative B-L and electroweak symmetry breaking, the present experimental lower bounds on the B-L vector boson and sparticle masses, as well as the lightest neutral Higgs mass of ∼125 GeV. The subspace of initial parameters that satisfies all such constraints is presented, shown to be robust and to contain a wide range of different configurations of soft supersymmetry breaking masses. The low-energy predictions of each such "valid" point - such as the sparticle mass spectrum and, in particular, the LSP - are computed and then statistically analyzed over the full subspace of valid points. Finally, the amount of fine-tuning required is quantified and compared to the MSSM computed using an identical random scan. The B-L MSSM is shown to generically require less fine-tuning.