出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We give a progress report on studies of Bs and Bd mixing with valence NRQCD b quarks and asqtad
light quarks on the MILC congurations including the effect of 2+1 avours of sea quarks. We
explore methods for reducing statistical and systematic errors in the ratio x = fBs
p
BBs= fBd
p
BBd .
