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Sang, WL; Chen, HT; Chen, YQ; Sang, WL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
Order-v(4) relativistic corrections to gamma inclusive decay into a charm pair
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordDimensional Regularization Quarkonium Decay
AbstractIn 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.
2012
ISSN1550-7998
Volume86Issue:11Pages:114004
Subject AreaPhysics
Indexed BySCI
Funding OrganizationChina 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]
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14961
Collection理论物理所科研产出_SCI论文
Corresponding AuthorSang, WL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
Recommended Citation
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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