Speaker
Dr
Henning Flaecher
(Royal Holloway, University of London)
Description
Already today, low-energy data from flavour physics experiments, high precision electroweak observables as well as astrophysical data impose strong constraints on many new physics (NP) scenarios. In order to quantify the agreement of a particular NP model with the existing experimental measurements, a consistent set of theory predictions has to be provided. A common "MasterCode" to combine the different calculations has been set up by a collaboration of experimentalists and theorists from various fields. This package integrates state-of-the-art calculations of low-energy physics, electroweak and astroparticle observables in the minimal supersymmetric standard model (MSSM). It was recently updated to accommodate different constrained versions of the MSSM, while the list of flavour physics observables was significantly enlarged. Using this tool, we carry out multidimensional \chi^2 scans of the MSSM parameter space based on Markov Chain Monte Carlo. The results of this study indicate that already today's experimental data allows to place tight constraints on the MSSM. Furthermore, we evaluate the importance of several observables by investigating how the deviation from the Standard Model expectation and the uncertainty of the experimental measurement influence the allowed MSSM parameter space. In this talk we present the results of the above studies and outline the design and usage of the "MasterCode".