New parametrization of the form factors in (B)over-bar -> Dl(nu)over-bar(l) decays

doi:10.1103/PhysRevD.101.034014

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	New parametrization of the form factors in (B)over-bar -> Dl(nu)over-bar(l) decays
	Yao, De-Liang ; Fernandez-Soler, Pedro ; Guo, Feng-Kun ; Nieves, Juan 6
刊名	PHYSICAL REVIEW D
	2020
卷号	101 期号:3 页码:34014
关键词	CB-VERTICAL-BAR EXCLUSIVE PROCESSES DISPERSIVE BOUNDS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.101.034014
英文摘要	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.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27033]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.UV, Inst Invest Paterna, Ctr Mixto, Inst Fis Corpuscular,CSIC, Apartado 22085, Valencia 46071, Spain 2.Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.[Yao, De-Liang 6.Fernandez-Soler, Pedro
推荐引用方式 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.