出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a calculation of the 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 form factor is computed at zero recoil using a new double ratio method which yields the form
factor more directly than previous approaches.
