Heavy pseudoscalar leading-twist distribution amplitudes within QCD theory in background fields
文献类型：期刊论文
| 作者 | Zhong T(钟涛); 黄涛(理) ; Zhong, T; Wu, XG; Huang, T
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| 刊名 | EUROPEAN PHYSICAL JOURNAL C
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| 出版日期 | 2015 |
| 卷号 | 75期号:2页码:45 |
| 通讯作者 | 钟涛 ; 黄涛（理） |
| 英文摘要 | In this paper, we study the leading-twist distribution amplitude (DA) of the heavy pseudoscalars (HPs), such as eta(c), eta(b), and B-c, within the QCD theory in the background fields. New sum rules up to dimension-six condensates for both the HP decay constants and their leading-twist DA moments are presented. From the sum rules for the HP decay constants, we obtain f(eta c) = 453 +/- 4 MeV, f(Bc) = 498 +/- 14 MeV, and f(eta b) = 811 +/- 34 MeV. Based on the sum rules for the HPs' leading-twist DA moments, we construct a new model for the eta(c), eta(b), and B-c leading-twist DAs. Our present HP DA model is also adaptable for the light pseudoscalar DAs, such as the pion and kaon DAs. Thus, it shall be applicable for a wide range of QCD exclusive processes. As an application, we apply the eta(c) leading-twist DA to calculate the B-c -> eta(c) transition form factor f(+)(Bc ->eta c) (q(2)). At the maximum recoil region, we obtain f(+)(Bc ->eta c) (0) = 0.612(-0.052)(+0.053). Furthermore we predict the branching ratio for the semi-leptonic decay B-c -> eta(c)l nu and obtain B(B-c -> eta(c)l nu) = (7.70(-1.48)(+1.65)) x 10(-3) for massless leptons, which is consistent with the light-cone sum rules estimation obtained in the literature. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Particles & Fields |
| 收录类别 | SCI ; CA |
| WOS记录号 | WOS:000349313400007 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228105]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhong T,Huang T,Zhong, T,et al. Heavy pseudoscalar leading-twist distribution amplitudes within QCD theory in background fields[J]. EUROPEAN PHYSICAL JOURNAL C,2015,75(2):45. |
| APA | 钟涛,黄涛,Zhong, T,Wu, XG,&Huang, T.(2015).Heavy pseudoscalar leading-twist distribution amplitudes within QCD theory in background fields.EUROPEAN PHYSICAL JOURNAL C,75(2),45. |
| MLA | 钟涛,et al."Heavy pseudoscalar leading-twist distribution amplitudes within QCD theory in background fields".EUROPEAN PHYSICAL JOURNAL C 75.2(2015):45. |
入库方式： OAI收割
来源：高能物理研究所
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