出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a calculation of the zero-recoil form factor for B ! D¤ln using a 2+1 improved
staggered action for the light quarks (on the MILC configurations), and the Fermilab action for
the heavy quarks. The Fermilab double-ratio method is used to compute various three point
functions, and, guided by heavy quark effective theory, this allows us to construct the needed
form factor.
