TY  - JOUR
AU  - Yao, D. L.
AU  - Fernandez-Soler, P.
AU  - Guo, F. K.
AU  - Nieves, J.
PY  - 2020
DA  - 2020//
TI  - New parametrization of the form factors in (B)over-bar -> Dl(nu)over-bar(l) decays
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 034014
EP  - 7pp
VL  - 101
IS  - 3
PB  - Amer Physical Soc
AB  - A new model-independent parametrization is proposed for the hadronic form factors in the semileptonic (B) over bar -> Dl (nu) over bar (l) decay. By a combined consideration of the recent experimental and lattice QCD data, we determine precisely the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar = 41.01(75) x 10(-3) and the ratio R-D = BR((B) over bar -> D tau(nu) over bar (tau))/BR((B) over bar -> Dl (nu) over bar (l)) = 0.301(5). The coefficients in this parametrization, related to phase shifts by sumrulelike dispersion relations and hence called phase moments, encode important scattering information of the (B) over bar (D) over bar interactions which are poorly known so far. Thus, we give strong hints about the existence of at least one bound and one virtual (B) over bar (D) over bar S-wave 0(+) states, subject to uncertainties produced by potentially sizable inelastic effects. This formalism is also applicable for any other semileptonic processes induced by the weak b -> c transition.
SN  - 2470-0010
UR  - https://arxiv.org/abs/1906.00727
UR  - https://doi.org/10.1103/PhysRevD.101.034014
DO  - 10.1103/PhysRevD.101.034014
LA  - English
N1  - WOS:000513217400004
ID  - Yao_etal2020
ER  -