SUSY in the Light of B Physics and Electroweak Precision Observables

TL;DR

This paper reviews how precise electroweak and B-physics measurements constrain supersymmetry models, performing chi-squared fits to CMSSM and NUHM parameters assuming dark matter relic density, and deriving bounds on the Higgs mass.

Contribution

It provides a comprehensive analysis combining electroweak and B-physics observables to constrain SUSY models and derive bounds on the Higgs mass within CMSSM and NUHM frameworks.

Findings

Indirect bounds on the lightest Higgs boson mass in CMSSM.

Constraints on SUSY parameter space from combined observables.

Implications for SUSY dark matter and collider searches.

Abstract

Indirect information about the possible scale of supersymmetry (SUSY) breaking can be obtained from the comparison of precisely measured observables (and also of exclusion limits) with accurate theory predictions incorporating SUSY loop corrections. Recent results are reviewed obtained from a combined analysis of the most sensitive electroweak precision observables (EWPO), M_W, sin^2_theta^eff, Gamma_Z, (g-2)_\mu and M_h, and B-physics observables (BPO), BR(b -> s \gamma), BR(B_s -> \mu^+\mu^-), BR(B_u -> \tau \nu_\tau) and \Delta M_{B_s}. Assuming that the lightest supersymmetric particle (LSP) provides the cold dark matter density preferred by WMAP and other cosmological data, \chi^2 fits are performed 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, and the non-universal Higgs model (NUHM), in which this constraint is relaxed for the soft SUSY-breaking contributions to the Higgs masses. Within the CMSSM indirect bounds on the mass of the lightest CP-even Higgs boson are derived.