Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair
文献类型：期刊论文
| 作者 | Chen, YQ
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:11页码:114004 |
| 关键词 | DIMENSIONAL REGULARIZATION QUARKONIUM DECAY |
| ISSN号 | 1550-7998 |
| 通讯作者 | Sang, WL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China. |
| 英文摘要 | In this work, we determine the short-distance coefficients for gamma inclusive decay into a charm pair through relative order v(4) within the framework of nonrelativistic QCD ( NRQCD) factorization formula. The short-distance coefficient of the order-v(4) color-singlet NRQCD matrix element is obtained through matching the decay rate of b (b) over bar(S-3(1)[1])-> c (c) over bar gg in full QCD to that in NRQCD. The double and single IR divergences appearing in the decay rate are exactly canceled through the next-to-next-to-leading-order renormalization of the operator O(S-3(1)[8]) and the next-to-leading-order renormalization of the operators O(P-3(J)[8]). To investigate the convergence of the relativistic expansion arising from the color-singlet contributions, we study the ratios of the order-v(2) and -v(4) color-singlet short-distance coefficients to the leading-order one. Our results indicate that though the order-v(4) color-singlet short-distance coefficient is quite large, the relativistic expansion for the color-singlet contributions in the process gamma -> c (c) over bar + X converges well due to a small value of v. In addition, we extrapolate the value of the mass ratio of the charm quark to the bottom quark, and find the relativistic corrections rise quickly with increase of the mass ratio. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156] |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevD.86.114004 |
| 语种 | 英语 |
| WOS记录号 | WOS:000311807900006 |
| 公开日期 | 2014-04-24 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/14961]  |
| 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 | Chen, YQ. Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair[J]. PHYSICAL REVIEW D,2012,86(11):114004. |
| APA | Chen, YQ.(2012).Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair.PHYSICAL REVIEW D,86(11),114004. |
| MLA | Chen, YQ."Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair".PHYSICAL REVIEW D 86.11(2012):114004. |
入库方式： OAI收割
来源：理论物理研究所
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