Perturbative and Non-perturbative Corrections to B → Dlν
نویسنده
چکیده
The ratios R+, R1, and RA are defined at zero recoil; the ratio R− is defined in the limit of zero recoil. The ρ are matching factors, needed to patch radiative corrections from short distances. The ratios R+ and R− directly give the form factors h+ and h−, which together form the hadronic amplitude for B → Dlν. Information from R+, R1, and RA must be extracted from their heavy quark expansions to obtain h ∗ A1 , the hadronic amplitude for B → Dlν [2].
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تاریخ انتشار 1999