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Yao, De-Liang; Fernandez-Soler, Pedro; Guo, Feng-Kun; Nieves, Juan3
New parametrization of the form factors in (B)over-bar -> Dl(nu)over-bar(l) decays
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordCB-VERTICAL-BAR EXCLUSIVE PROCESSES DISPERSIVE BOUNDS
AbstractA 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.
2020
ISSN2470-0010
Volume101Issue:3Pages:34014
Cooperation Status国际
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.101.034014
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27033
CollectionSCI期刊论文
Affiliation1.Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China
2.[Yao, De-Liang
3.Fernandez-Soler, Pedro
4.UV, Inst Invest Paterna, Ctr Mixto, Inst Fis Corpuscular,CSIC, Apartado 22085, Valencia 46071, Spain
5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
6.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yao, De-Liang,Fernandez-Soler, Pedro,Guo, Feng-Kun,et al. New parametrization of the form factors in (B)over-bar -> Dl(nu)over-bar(l) decays[J]. PHYSICAL REVIEW D,2020,101(3):34014.
APA Yao, De-Liang,Fernandez-Soler, Pedro,Guo, Feng-Kun,&Nieves, Juan.(2020).New parametrization of the form factors in (B)over-bar -> Dl(nu)over-bar(l) decays.PHYSICAL REVIEW D,101(3),34014.
MLA Yao, De-Liang,et al."New parametrization of the form factors in (B)over-bar -> Dl(nu)over-bar(l) decays".PHYSICAL REVIEW D 101.3(2020):34014.
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