Quasidistribution amplitude of heavy quarkonia
Jia Y(贾宇); Jia, Y; Xiong, XN
刊名PHYSICAL REVIEW D
2016
卷号94期号:9
DOI10.1103/PhysRevD.94.094005
通讯作者贾宇
文章类型Article
英文摘要The recently proposed quasidistributions point out a promising direction for lattice QCD to investigate the light-cone correlators, such as parton distribution functions and distribution amplitudes (DAs), directly in the x space. Owing to its excessive simplicity, heavy quarkonium can serve as an ideal theoretical laboratory to ascertain certain features of quasi-DAs. In the framework of nonrelativistic QCD factorization, we compute the order-as correction to both light-cone distribution amplitudes (LCDAs) and quasi-DAs associated with the lowest-lying quarkonia, with the transverse-momentum UV cutoff interpreted as the renormalization scale. We confirm analytically that the quasi-DA of a quarkonium does reduce to the respective LCDA in the infinite-momentum limit. We also observe that, provided that the momentum of a charmonium reaches about 2-3 times its mass, the quasi-DAs already converge to the LCDAs to a decent level. These results might provide some useful guidance for the future lattice study of quasidistributions.
关键词[WOS]QUANTUM CHROMODYNAMICS ; PARTON DISTRIBUTIONS ; EXCLUSIVE PROCESSES ; NEAR-THRESHOLD ; QCD ; FRAGMENTATION ; FACTORIZATION ; CHARMONIUM ; HELICITY ; DECAYS
语种英语
WOS记录号WOS:000386896900002
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260649
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_理论物理室
作者单位中国科学院高能物理研究所
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Jia Y,Jia, Y,Xiong, XN. Quasidistribution amplitude of heavy quarkonia[J]. PHYSICAL REVIEW D,2016,94(9).
APA 贾宇,Jia, Y,&Xiong, XN.(2016).Quasidistribution amplitude of heavy quarkonia.PHYSICAL REVIEW D,94(9).
MLA 贾宇,et al."Quasidistribution amplitude of heavy quarkonia".PHYSICAL REVIEW D 94.9(2016).
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