出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study three sources of error in our calculation of BK using HYP-smeared staggered fermions on the MILC asqtad lattices. These are (1) dependence on the light sea quark mass; (2) finite volume effects; and (3) the impact of an order of magnitude increase in the number of measurements. Our main results are (1) the dependence on the light sea-quark mass is weaker than expected by naive dimensional analysis, (2) including finite volume effects in SU(2) staggered chiral perturbation theory fits leads to a very small change in BK, of size 0:1%, and (3) increasing the statistics on one of the coarse MILC lattices resolves a potential discrepancy with other coarse results.
