PREDICTIONS FOR B-]D-1(2420)L(NU)OVER-BAR AND B-]D-2-ASTERISK(2460)L(NU)OVER-BAR AT ORDER LAMBDA(QCD) M(C,B)/

Citation
Ak. Leibovich et al., PREDICTIONS FOR B-]D-1(2420)L(NU)OVER-BAR AND B-]D-2-ASTERISK(2460)L(NU)OVER-BAR AT ORDER LAMBDA(QCD) M(C,B)/, Physical review letters, 78(21), 1997, pp. 3995-3998
Citations number
26
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
78
Issue
21
Year of publication
1997
Pages
3995 - 3998
Database
ISI
SICI code
0031-9007(1997)78:21<3995:PFBAB>2.0.ZU;2-F
Abstract
Exclusive semileptonic B decays into D-1 and D-2 mesons are investiga ted including order Lambda(QCD)/m(c,b) corrections using the heavy qua rk effective theory. At zero recoil, the Lambda(QCD)/m(c,b) correction s can be written in terms of the leading Isgur-Wise function for these transitions, tau, and known meson mass splittings. We obtain an almos t model independent prediction for the shape of the spectrum near zero recoil, including order Lambda(QCD)/m(c,b) corrections. We determine tau(1) from the measured B --> <D(1)l(v)over bar> branching ratio. Imp lications for B decay sum rules are discussed.