Markov Chain Monte Carlo Exploration of Minimal Supergravity with Implications for Dark Matter

Details Markov Chain Monte Carlo Exploration of Minimal Supergravity with Implications for Dark Matter Markov Chain Monte Carlo Exploration of Minimal Supergravity with Implications for Dark Matter

2004-07-03

arxiv.org/abs/hep-ph/0407039v1

JHEP 0410:052,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 4 figures

Scientific paper

10.1088/1126-6708/2004/10/052

We explore the full parameter space of Minimal Supergravity (mSUGRA), allowing all four continuous parameters (the scalar mass m_0, the gaugino mass m_1/2, the trilinear coupling A_0, and the ratio of Higgs vacuum expectation values tan beta) to vary freely. We apply current accelerator constraints on sparticle and Higgs masses, and on the b -> s gamma branching ratio, and discuss the impact of the constraints on g_mu-2. To study dark matter, we apply the WMAP constraint on the cold dark matter density. We develop Markov Chain Monte Carlo (MCMC) techniques to explore the parameter regions consistent with WMAP, finding them to be considerably superior to previously used methods for exploring supersymmetric parameter spaces. Finally, we study the reach of current and future direct detection experiments in light of the WMAP constraint.

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