The D ->rho semileptonic and radiative decays within the light-cone sum rules
文献类型：期刊论文
| 作者 | Fu, Hai-Bing; Zeng, Long4; Lu, Rong4; Cheng, Wei1; Wu, Xing-Gang |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2020 |
| 卷号 | 80期号:3页码:194 |
| 关键词 | LONG-DISTANCE HEAVY-QUARK VERTICAL-BAR FORM-FACTORS WEAK DECAYS D-MESONS QCD LATTICE ASTERISK PHYSICS |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-020-7758-4 |
| 英文摘要 | The measured branching ratio of the D meson semileptonic decay D ->rho e+nu e\ which is based on the 0.82fb-1 CLEO data taken at the peak of psi(3770)-69pt} \begin{document}$$\psi (3770)$$\end{document} resonance, disagrees with the traditional SVZ sum rules analysis by about three times. In the paper, we show that this discrepancy can be eliminated by applying the QCD light-cone sum rules (LCSR) approach to calculate the D ->rho transition form factors A1,2(q2) and V(q2). After extrapolating the LCSR predictions of these TFFs to whole q2-region, we obtain 1/|Vcd|2x Gamma(D ->rho e nu e)=(55.45-9.41+13.34)x10-15GeVtimes \Gamma (D \rightarrow \rho e \nu _e) =(55.45<^>{+13.34}_{-9.41})\times 10<^>{-15}similar to\mathrm{GeV}$$\end{document}. Using the CKM matrix element and the D0(D+)ifetime from the Particle Data Group, we obtain B(D0 ->rho-e+nu e)=(1.749-0.297+0.421 +/- 0. 006)x10-3 ) = (1.749<^>{+0.421}_{-0.297}\pm 0.006)\times 10<^>{-3}$$\end{document} and B(D+->rho 0e+nu e)=(2.217-0.376+0.534 +/- 0.015)x10-3 = (2.217<^>{+0.534}_{-0.376}\pm 0.015)\times 10<^>{-3}$$\end{document}, which agree with the CLEO measurements within errors. We also calculate the branching ratios of the two D meson radiative processes and obtain B(D0 ->rho 0 gamma)=(1.744-0.704+0.598)x10-5= (1.744<^>{+0.598}_{-0.704})\times 10<^>{-5}$$\end{document} and B(D+->rho+gamma)=(5.034-0.958+0.939)x10-5) = (5.034<^>{+0.939}_{-0.958})\times 10<^>{-5}$$\end{document}, which also agree with the Belle measurements within errors. Thus we think the LCSR approach is applicable for dealing with the D meson decays. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27110]  |
| 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.Guizhou Minzu Univ, Inst Particle Phys, Guiyang 550025, Guizhou, Peoples R China 2.Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Guizhou Minzu Univ, Dept Phys, Guiyang 550025, Guizhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu, Hai-Bing,Zeng, Long,Lu, Rong,et al. The D ->rho semileptonic and radiative decays within the light-cone sum rules[J]. EUROPEAN PHYSICAL JOURNAL C,2020,80(3):194. |
| APA | Fu, Hai-Bing,Zeng, Long,Lu, Rong,Cheng, Wei,&Wu, Xing-Gang.(2020).The D ->rho semileptonic and radiative decays within the light-cone sum rules.EUROPEAN PHYSICAL JOURNAL C,80(3),194. |
| MLA | Fu, Hai-Bing,et al."The D ->rho semileptonic and radiative decays within the light-cone sum rules".EUROPEAN PHYSICAL JOURNAL C 80.3(2020):194. |
入库方式： OAI收割
来源：理论物理研究所
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