B-c -> J/psi helicity form factors and the B-c(+) -> J/psi plus (P, V, l(+)nu(l)) decays
文献类型：期刊论文
| 作者 | Cheng, Wei3; Zhang, Yi; Zeng, Long; Fu, Hai-Bing; Wu, Xing-Gang |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2022 |
| 卷号 | 46期号:5页码:53103 |
| ISSN号 | 1674-1137 |
| 关键词 | SUM-RULES MESON QCD |
| DOI | 10.1088/1674-1137/ac4c9f |
| 英文摘要 | In this paper, we calculate the B-c -> J/psi helicity form factors (HFFs) up to twist-4 accuracy by using the light-cone sum rules (LCSR) approach. After extrapolating those HFFs to the physically allowable q(2) region, we investigate the B-c(+)-meson two-body decays and semi-leptonic decays B-c(+) -> J/psi (P, V, l(+)nu(l)), where P/V stand for light pseudoscalar and vector mesons, respectively. The branching fractions can be derived using the CKM matrix element and the B-c lifetime from the Particle Data Group, and we obtain B(B-c(+) -> J/psi pi(+)) = (0.1361(-0.002)(+0.002))%, B(B-c(+) -> J/psi K+) = (0.0101(-0.000)(+0.000))%, B(B-c(+) -> J/psi rho(+)) = (0.768(-0.033)(+0.029))%, B(B-c(+) -> J/psi K*(+)) = (0.043(-0.001)(+0.001))% , B(B-c(+) -> J/psi mu(+)nu(mu)) = (2.802(-0.675)(+0.526))% and B(B-c(+) -> J/psi tau(+) nu(tau)) = (0.559(-0.170)(+0.131))%. We then obtain R pi+/mu+nu mu =( )0.048(-0.012)(+0.009) and RK+/pi+ = 0 .075(-0.005)(+0.005), which agree with the LHCb measured value within 1 sigma-error. We also obtain R-J/psi = 0.199(-0.077)(+0.060), which like other theoretical predictions, is consistent with the LHCb measured value within 2 sigma-error. These imply that the HFFs under the LCSR approach are also applicable to the B-c(+) meson two-body decays and semi-leptonic decays B-c(+) -> J/psi + (P, V, l(+)nu(l)), and the HFFs obtained using LCSR in a new way implies that there may be new physics in the B-c -> J/psi l(+)nu(l) semi-leptonic decays. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27689]  |
| 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.Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China 2.Chongqing Key Lab Strongly Coupled Phys, Chongqing 401331, Peoples R China 3.Chongqing Univ Posts & Telecommun, Sch Sci, Chongqing 400065, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.Guizhou Minzu Univ, Dept Phys, Guiyang 550025, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Wei,Zhang, Yi,Zeng, Long,et al. B-c -> J/psi helicity form factors and the B-c(+) -> J/psi plus (P, V, l(+)nu(l)) decays[J]. CHINESE PHYSICS C,2022,46(5):53103. |
| APA | Cheng, Wei,Zhang, Yi,Zeng, Long,Fu, Hai-Bing,&Wu, Xing-Gang.(2022).B-c -> J/psi helicity form factors and the B-c(+) -> J/psi plus (P, V, l(+)nu(l)) decays.CHINESE PHYSICS C,46(5),53103. |
| MLA | Cheng, Wei,et al."B-c -> J/psi helicity form factors and the B-c(+) -> J/psi plus (P, V, l(+)nu(l)) decays".CHINESE PHYSICS C 46.5(2022):53103. |
入库方式： OAI收割
来源：理论物理研究所
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