Supported by Natural Science Foundation Project of CQ CSTC under Grant No.2008BB0298;by Natural Science Foundation of China under Grant Nos.10805082 and 11075225;by the Fundamental Research Funds for the Central Universities under Grant No.CDJZR101000616
The B-meson decay constant fB is an important component for studying the B-meson decays, which can be studied through QCD sum rules. We make a detailed discussion on f B from two sum rules up to next-to- leading order...