Knowledge Management System of Institute of Theoretical Physics, CAS
| 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 Publication | CHINESE PHYSICS C
 |
| Language | 英语 |
| Keyword | DECAY LATTICE |
| Abstract | In 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 | |
| ISSN | 1674-1137 |
| Volume | 44Issue:11Pages:113103 |
| Cooperation Status | 国内 |
| Subject Area | Physics |
| MOST Discipline Catalogue | Physics, Nuclear ; Physics, Particles & Fields |
| DOI | 10.1088/1674-1137/abae4f |
| Indexed By | SCIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/27198 |
| Collection | SCI期刊论文 |
| Affiliation | 1.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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| D - P(pi, K) helicit（955KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment