Flavor Data Constraints on the SUSY Parameter Space

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Abstract

We present an overview of the indirect constraints from flavor physics on supersymmetric models. During the past few years flavor data, and in particular b -> s gamma transitions, have been extensively used in order to constrain supersymmetric parameter spaces. We will briefly illustrate here the constraints obtained by a collection of low energy observables including FCNC transitions, rare decays, leptonic and semileptonic decays of B mesons, as well as leptonic decays of K mesons. The theoretical predictions can be obtained using the computer program SuperIso.

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High Precision determination of the pi, K, D and D_s decay constants from lattice QCD

G. Lepage, E Follana, C. T. H. Davies … (2007)

We determine \(D\) and \(D_s\) decay constants from lattice QCD with 2% errors, 4 times better than experiment and previous theory: \(f_{D_s}\) = 241(3) MeV, \(f_D\) = 207(4) MeV and \(f_{D_s}/f_D\) = 1.164(11). We also obtain \(f_K/f_{\pi}\) = 1.189(7) and \((f_{D_s}/f_D)/(f_K/f_{\pi})\) = 0.979(11). Combining with experiment gives \(V_{us}\)=0.2262(14) and \(V_{cs}/V_{cd}\) of 4.43(41). We use a highly improved quark discretization on MILC gluon fields that include realistic sea quarks fixing the \(u/d, s\) and \(c\) masses from the \(\pi\), \(K\), and \(\eta_c\) meson masses. This allows a stringent test against experiment for \(D\) and \(D_s\) masses for the first time (to within 7 MeV).

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The effect of H^\pm on B^\pm -> \tau^\pm \nu and B^\pm -> \mu^\pm \nu

A. Akeroyd, S Recksiegel (2003)

The hitherto unobserved purely leptonic decays B^\pm -> \tau^\pm \nu and B^\pm -> \mu^\pm \nu are of much interest at current and future runs of the e+e- B factories. Such decays are sensitive to charged Higgs bosons (H^\pm) at the tree-level and provide essentially model independent constraints on \tan\beta/m_{H^\pm}. We include the large corrections to the H^\pm-ub coupling induced by virtual SUSY effects and show that the bounds on \tan\beta/m_{H^\pm} can be significantly weakened or strengthened.

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Publication date Created: 28 August 2008

Article

DOI: 10.1063/1.3051922

ArXiV ID: 0808.3952

SO-VID: 4bf26b27-b77d-457d-953e-7966a9ca53d1

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http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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Journal reference AIP Conf.Proc.1078:243-246,2009

Comments Invited talk at the 16th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY08), Seoul, Korea, June 16-21, 2008

Categories hep-ph

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