The ratio R(D) and the D-meson distribution amplitude
文献类型：期刊论文
| 作者 | Zhong, Tao; Wu, XG; Zhang, Y; Zhong, T; Huang, Tao; Huang, T ; Fu, Hai-Bing; Fu, HB; Wu, Xing-Gang; Zhang, Yi
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| 刊名 | EUROPEAN PHYSICAL JOURNAL C
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| 出版日期 | 2018 |
| 卷号 | 78期号:11页码:937 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-018-6387-7 |
| 文献子类 | Article |
| 英文摘要 | In this paper, we calculate the B -> D transition form factors (TFFs) within the light-cone sum rules (LCSRs) and predict the ratio R(D). More accurate D-meson distribution amplitudes (DAs) are essential to get a more accurate theoretical prediction. We construct a new model for the twist-3 DAs phi(p)(3;D) and phi(sigma)(3;D) based on the QCD sum rules under the background field theory for their moments as we have done for constructing the leading-twist DA phi(2;D). As an application, we observe that the twist-3 contributions are sizable in whole q(2)-region. Taking the twist-2 and twist-3 DAs into consideration, we obtain f(+,0)(B -> D) (0) = 0.659(-0.032)(+0.029) -0.032. As a combination of the Lattice QCD and the QCD LCSR predictions on the TFFs f(+,0)(B -> D) (q(2)), we predict R(D) = 0.320(-0.021)(+0.018), which is about 1.5 sigma deviation from the HFAG average of the Belle and BABAR data. At present the data still have large errors, and we need further accurate measurements of the experiment to confirm whether there is a signal of new physics from the ratio R(D). |
| 电子版国际标准刊号 | 1434-6052 |
| WOS关键词 | TWIST-3 DISTRIBUTION AMPLITUDES ; CONE SUM-RULES ; WAVE-FUNCTIONS ; FORM-FACTOR ; QCD ; MASS ; DECAYS ; PION |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000450607400001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286960]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhong, Tao,Wu, XG,Zhang, Y,et al. The ratio R(D) and the D-meson distribution amplitude[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(11):937. |
| APA | Zhong, Tao.,Wu, XG.,Zhang, Y.,Zhong, T.,Huang, Tao.,...&Zhong, Tao, Zhang, Yi, Wu, Xing-Gang, Fu, Hai-Bing.(2018).The ratio R(D) and the D-meson distribution amplitude.EUROPEAN PHYSICAL JOURNAL C,78(11),937. |
| MLA | Zhong, Tao,et al."The ratio R(D) and the D-meson distribution amplitude".EUROPEAN PHYSICAL JOURNAL C 78.11(2018):937. |
入库方式： OAI收割
来源：高能物理研究所
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