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Fu, Hai-Bing; Cheng, Wei2,3; Zhou, Rui-Yu; Zeng, Long1
D -> P(pi, K) helicity form factors within light-cone sum rule approach
Source PublicationCHINESE PHYSICS C
Language英语
KeywordDECAY LATTICE
AbstractIn this study, D -> P(pi, K) helicity form factors (HFFs) are investigated by applying the QCD light-cone sum rule (LCSR) approach. The calculation accuracy is up to the next-to-leading order (NLO) gluon radiation correction of wtwist-(2,3) distribution amplitude. The resultant HFFs at a large recoil point are P-t,0(pi)(0) = 0.688(-0.024)(+0.020) and P-t,0(K)(0) = 0.780(-0.029)(+0.024), in which the contributions from the three particles of the leading order (LO) are so small that they can be safely neglected. The maximal contribution of the NLO gluon radiation correction for P-t,0(pi,K)(0) is less than 3%. After extrapolating the LCSR predictions for these HFFs to the whole q(2)-region, we obtain the decay widths for semileptonic decay processes D -> Plv(l), which are consistent with the BES-III collaboration predictions within error limits. After considering the D+/D-0-meson lifetime, we give the branching fractions of D -> Plv(l) with l = e,mu; our predictions also agree with the BES-III collaboration results within error limits, especially for the D -> pi lv(l) decay process. Finally, we present the forward-backward asymmetry A(FB)(l)(q(2)) and lepton convexity parameter, and further calculate the mean value of these two observations, < A(FB)(l)> and < C-F(l)>, which may provide a way to test those HFFs in future experiments.
2020
ISSN1674-1137
Volume44Issue:11Pages:113103
Cooperation Status国内
Subject AreaPhysics
MOST Discipline CataloguePhysics, Nuclear ; Physics, Particles & Fields
DOI10.1088/1674-1137/abae4f
Indexed BySCIE
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27198
CollectionSCI期刊论文
Affiliation1.Guizhou Minzu Univ, Inst Particle Phys, Guiyang 550025, Peoples R China
2.Guizhou Minzu Univ, Dept Phys, Guiyang 550025, Peoples R China
3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
5.Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China
Recommended Citation
GB/T 7714
Fu, Hai-Bing,Cheng, Wei,Zhou, Rui-Yu,et al. D -> P(pi, K) helicity form factors within light-cone sum rule approach[J]. CHINESE PHYSICS C,2020,44(11):113103.
APA Fu, Hai-Bing,Cheng, Wei,Zhou, Rui-Yu,&Zeng, Long.(2020).D -> P(pi, K) helicity form factors within light-cone sum rule approach.CHINESE PHYSICS C,44(11),113103.
MLA Fu, Hai-Bing,et al."D -> P(pi, K) helicity form factors within light-cone sum rule approach".CHINESE PHYSICS C 44.11(2020):113103.
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