出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We report on the advances in our unquenched calculation of the matrix elements relevant for the
analysis of B0 ¯B0 mixing using the Asqtad (light quark) and Fermilab (heavy quark) actions. We
have calculated the hadronic parameters for the mass and width differences in the neutral B meson
system. Preliminary results are presented for f 2
BqBq as well as for the ratio x 2 = f 2
BsBBs= f 2
BdBBd .
