Global analysis of charmless b decays into two vector mesons in soft-collinear effective theory
文献类型：期刊论文
| 作者 | Wang, Chao2,3; Zhou, Si-Hong2,3; Li, Ying1; Lu, Cai-Dian2,3 |
| 刊名 | Physical review d
 |
| 出版日期 | 2017-10-04 |
| 卷号 | 96期号:7页码:13 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.96.073004 |
| 通讯作者 | Li, ying(liying@ytu.edu.cn) |
| 英文摘要 | Under the framework of soft-collinear effective theory, we analyze the charmless b -> vv decays in a global way at leading power in 1/m(b) and leading order in alpha(s) with v denoting a light vector meson. in the flavor su(3) symmetry, decay amplitudes for the 28 decay modes are expressed in terms of eight nonperturbative parameters. we fit these eight nonperturbative parameters with 35 experimental results. annihilation contributions are neglected due to power suppression in the m(b)->infinity limit, so we include in the fit the nonperturbative charm penguins, which will play an important role in understanding the direct cp asymmetries. charming penguins are also responsible for the large transverse polarizations of penguin-dominated and color-suppressed decays. with the best-fitted parameters, we calculate all possible physical observables of 28 decay modes, including branching fractions, direct cp asymmetries, and the complete set of polarization observables. most of our results are compatible with the present experimental data when available, while others can be examined on the ongoing lhcb experiment and the forthcoming belle ii experiment. moreover, the agreements and differences with results in qcd factorization and perturbative qcd approach are also discussed. a few observables are suggested to discriminate between these different approaches. |
| WOS关键词 | CHARMING PENGUINS ; QCD FACTORIZATION ; VV DECAYS ; POLARIZATION |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000412248200002 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177096 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Li, Ying |
| 作者单位 | 1.Yantai Univ, Dept Phys, Yantai 264005, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Chao,Zhou, Si-Hong,Li, Ying,et al. Global analysis of charmless b decays into two vector mesons in soft-collinear effective theory[J]. Physical review d,2017,96(7):13. |
| APA | Wang, Chao,Zhou, Si-Hong,Li, Ying,&Lu, Cai-Dian.(2017).Global analysis of charmless b decays into two vector mesons in soft-collinear effective theory.Physical review d,96(7),13. |
| MLA | Wang, Chao,et al."Global analysis of charmless b decays into two vector mesons in soft-collinear effective theory".Physical review d 96.7(2017):13. |
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来源：高能物理研究所
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