Calculation of BSM Kaon B-parameters using Staggered Quarks

We present updated results for kaon B-parameters for operators arising in models of new physics. We use HYP-smeared staggered quarks on the N f = 2+1 MILC asqtad lattices. During the last year we have added new ensembles, which has necessitated chiral-continuum fitting with more elaborate fitting functions. We have also corrected an error in a two-loop anomalous dimension used to evolve results between different scales. Our results for the beyond-the-Standard-Model B-parameters have total errors of 5−10%. We find that the discrepancy observed last year between our results and those of the RBC/UKQCD and ETM collaborations for some of the B-parameters has been reduced from 4−5σ to 2−3σ