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Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair
Sang, WL; Chen, HT; Chen, YQ; Sang, WL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
2012
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号86期号:11页码:114004
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.
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
关键词Dimensional Regularization Quarkonium Decay
学科领域Physics
资助者China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156] ; China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156] ; China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156] ; China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156]
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收录类别SCI
语种英语
资助者China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156] ; China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156] ; China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156] ; China Postdoctoral Science Foundation [2012M510549]; NSFC [10875156]
WOS记录号WOS:000311807900006
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14961
专题2012年知识产出
通讯作者Sang, WL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
推荐引用方式
GB/T 7714
Sang, WL,Chen, HT,Chen, YQ,et al. Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair[J]. PHYSICAL REVIEW D,2012,86(11):114004.
APA Sang, WL,Chen, HT,Chen, YQ,&Sang, WL .(2012).Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair.PHYSICAL REVIEW D,86(11),114004.
MLA Sang, WL,et al."Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair".PHYSICAL REVIEW D 86.11(2012):114004.
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