出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The recently measured Br(B0 ! D−pn) is a few times smaller than
Br(B0 ! D−+). We try to understand this with a factorization approach. The nucleon
pair is directly produced from the weak current whose form factors are related by
the isospin rotation to nucleon electromagnetic form factors. By using Gp;n
M measured
from e+e− ! NN and pp ! e+e− processes, we are able to account for up to 60% of
the observed rate. The remainder is argued to arise from the axial current. The model
can be applied to B decays to other mesons plus pn modes and D− plus strange baryon
pairs.
