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题名: Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair
作者: Sang, WL ;  Chen, HT ;  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
学科分类: Physics
通讯作者: Sang, WL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
部门归属: [Sang, Wen-Long] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Chen, Hai-Ting; Chen, Yu-Qi] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, 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.
资助者: China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000311807900006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14961
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Sang, WL,Chen, HT,Chen, YQ. Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair[J]. PHYSICAL REVIEW D,2012,86(11):114004.
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