Dr Sky Bauman (University of Wisconsin-Madison)
Low energy precision tests provide a probe on new physics which can complement the LHC. One such test is of first row CKM unitarity, which we are using to place limits on MSSM parameters. We scanned over the parameter space of the MSSM, and computed corrections to the Fermi constant for beta decay as a function of MSSM parameters. These corrections lead to apparent violations of first row CKM unitarity. Due to current conservation, strong dynamics do not overwhelm these corrections. Experimental precision is at the part per thousand level. Theoretical hadronic and nuclear physics uncertainties also have been reduced to this level. There is intense activity, particularly with ongoing developments in neutron decay. It is interesting to ask at what level of precision these experiments probe SUSY. Our study sets the benchmark of precision for the needed sensitivity.