Interplay of Electroweak Precision Observables and B Physics Observables

الأصل · EN

Indirect information about the possible scale of supersymmetry (SUSY) breaking is provided by B physics observables (BPO) as well as electroweak precision observables (EWPO). We review the combination of the constraints imposed by recent measurements of the BPO BR(b -> s gamma), BR(Bₛ -> mu+ mu-), BR(Bᵤ -> tau nuₜau) and Delta MBₛ with those obtained from the experimental measurements of the EWPO MW, sin² thetaₑff, GammaZ, (g-2)ₘu and Mₕ. We perform a chi² fit to the parameters of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which the SUSY-breaking parameters are universal at the GUT scale. Assuming that the lightest supersymmetric particle (LSP) provides the cold dark matter density preferred by WMAP and other cosmological data, we confirm the preference found previously for a relatively low SUSY-breaking scale, though there is some slight tension between the EWPO and the BPO.