Constraints on hard spectator scattering and annihilation corrections in decays within QCD factorization
文献类型：期刊论文
| 作者 | Sun, JF; Chang, Q; Hu, XH; Yang, YL |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2015 |
| 卷号 | 743期号:0页码:444-450 |
| 通讯作者 | Chang, Q (reprint author), Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China. |
| 英文摘要 | In this paper, we investigate the contributions of hard spectator scattering and annihilation in B -> PV decays within the QCD factorization framework. With available experimental data on B -> pi K*, rho K, pi rho and K phi decays, comprehensive chi(2) analyses of the parameters X-A,H(i,f)(rho(i,f)(A,H), phi(i,f)(A,H)) are performed, where X-A(f)(X-A(i)) and X-H are used to parameterize the endpoint divergences of the (non) factorizable annihilation and hard spectator scattering amplitudes, respectively. Based on chi(2) analyses, it is observed that (1) The topology-dependent parameterization scheme is feasible for B -> PV decays; (2) At the current accuracy of experimental measurements and theoretical evaluations, X-H = X-A(i) is allowed by B -> PV decays, but X-H not equal X-A(f) at 68% C.L.; (3) With the simplification X-H = X-A(i), parameters X-A(f) and X-A(i) should be treated individually. The above-described findings are very similar to those obtained from B -> PP decays. Numerically, for B -> PV decays, we obtain (rho(i)(A,H), phi(i)(A,H)[degrees]) = (2.87(-1.95)(+0.66), -145(-21)(+14)) and (rho(f)(A), phi(f)(A)[degrees]) = (0.91(-0.13)(+0.12), -37(-9)(+10)) at 68% C.L. With the best-fit values, most of the theoretical results are in good agreement with the experimental data within errors. However, significant corrections to the color-suppressed tree amplitude alpha(2) related to a large rho H result in the wrong sign for A(CP)(dir)(B- -> pi K-0*(-)) compared with the most recent BABAR data, which presents a new obstacle in solving "pi pi" and "pi K" puzzles through alpha(2). A crosscheck with measurements at Belle (or Belle II) and LHCb, which offer higher precision, is urgently expected to confirm or refute such possible mismatch. (C) 2015 The Authors. Published by Elsevier B.V. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields |
| 关键词[WOS] | NONLEPTONIC-B DECAYS ; TREE AMPLITUDES ; CP VIOLATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21032]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Sun, JF,Chang, Q,Hu, XH,et al. Constraints on hard spectator scattering and annihilation corrections in decays within QCD factorization[J]. PHYSICS LETTERS B,2015,743(0):444-450. |
| APA | Sun, JF,Chang, Q,Hu, XH,&Yang, YL.(2015).Constraints on hard spectator scattering and annihilation corrections in decays within QCD factorization.PHYSICS LETTERS B,743(0),444-450. |
| MLA | Sun, JF,et al."Constraints on hard spectator scattering and annihilation corrections in decays within QCD factorization".PHYSICS LETTERS B 743.0(2015):444-450. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。