The systematic study of B -> pi form factors in pQCD approach and its reliability
文献类型：期刊论文
| 作者 | Wei, ZT; Yang, MZ; Wei, ZT , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China. |
| 刊名 | NUCLEAR PHYSICS B
 |
| 出版日期 | 2002 |
| 卷号 | 642期号:40910页码:263-289 |
| 关键词 | Exclusive Semileptonic Decays Perturbative Qcd B->pi-pi Decays Cp Violation Meson Decays Heavy-quark Factorization Applicability Extraction Behavior |
| ISSN号 | 0550-3213 |
| 英文摘要 | The study of exclusive B decays in perturbative QCD are complicated by the endpoint problem. In order to perform the perturbative calculation, the Sudakov effects are introduced to regulate the endpoint singularity. We provide a systematic analysis with leading and next-to-leading twist corrections for B --> pi form factors in pQCD approach. The intrinsic transverse momentum dependence of hadronic wave function and threshold resummation effects are included in pQCD approach. There are two leading twist B meson distribution amplitudes (or generally wave functions) in general. The QCD equations of motion provide important constraints on B meson wave functions. The reliability of pQCD approach in B --> pi form factors is discussed. 70% of the result comes from the region alpha(s)(t)/pi < 0.2 and 38% comes from the region where the momentum transfer t greater than or equal to 1 GeV. The conceptual problems of pQCD approach are discussed in brief. Our conclusion is that pQCD approach in the present form cannot provide a precise prediction for B --> pi transition form factors. (C) 2002 Elsevier Science B.V. All rights reserved. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000178920400011 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13414]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Wei, ZT , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wei, ZT,Yang, MZ,Wei, ZT , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.. The systematic study of B -> pi form factors in pQCD approach and its reliability[J]. NUCLEAR PHYSICS B,2002,642(40910):263-289. |
| APA | Wei, ZT,Yang, MZ,&Wei, ZT , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China..(2002).The systematic study of B -> pi form factors in pQCD approach and its reliability.NUCLEAR PHYSICS B,642(40910),263-289. |
| MLA | Wei, ZT,et al."The systematic study of B -> pi form factors in pQCD approach and its reliability".NUCLEAR PHYSICS B 642.40910(2002):263-289. |
入库方式： OAI收割
来源：理论物理研究所
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