NON-FACTORIZABLE TERMS, HEAVY QUARK MASSES, AND SEMILEPTONIC DECAYS OF D AND B MESONS
2002 ◽
Vol 17
(04)
◽
pp. 245-251
◽
The non-factorizable terms in the operator product expansion have been recognized as one of the theoretical obstacles for precision determination of the mixing parameter Vub from semileptonic B decays. It is pointed out here that the recent CLEO data on the parameters of the heavy quark expansion λ1 and [Formula: see text], combined with a theoretical bound on λ1 strongly favor the existence of a sizeable contribution of non-factorizable terms in semileptonic decays of D mesons. Thus these terms are likely to solve the long-standing problem of the deficit of semileptonic decay rate of the D mesons, and with better data their magnitude can be determined and used in studies of the parameter Vub.
2013 ◽
Vol 28
(26)
◽
pp. 1360019
◽
1994 ◽
Vol 413
(1-2)
◽
pp. 396-410
◽
2011 ◽
Vol 26
(03n04)
◽
pp. 549-551
2003 ◽
Vol 558
(3-4)
◽
pp. 125-131
◽
Keyword(s):
2001 ◽
Vol 619
(1-3)
◽
pp. 588-602
◽