Refactorizing NRQCD short-distance coefficients in exclusive quarkonium production
Jia Y(贾宇); Jia, Y; Yang, DS
刊名NUCLEAR PHYSICS B
2009
卷号814期号:1-2页码:#REF!
学科分类Physics
DOI10.1016/j.nuclphysb.2009.01.025
通讯作者Jia, Y (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
文章类型Article
英文摘要In a typical exclusive quarkonium production process, when the center-of-mass energy, is much greater than the heavy quark mass in, large kinematic logarithms of s/m(2) will unavoidably arise at each order of perturbative expansion in the short-distance coefficients of the nonrelativistic QCD (NRQCD) factorization formalism, which may potentially harm the perturbative expansion. This symptom reflects that the hard regime in NRQCD factorization is too coarse and should be further factorized. We suggest that this regime can be further separated into "hard" and "collinear" degrees of freedom, so that the familiar light-cone approach can be employed to reproduce the NRQCD matching coefficients at the zeroth order of m(2)/s and order by order in alpha(s). Taking two simple processes, exclusive eta(b)+ gamma production in e(+)e(-) annihilation and Higgs boson radiative decay into gamma, as examples, we illustrate how the leading logarithms of s/m(2) in the NRQCD matching coefficients are identified and summed to all orders in alpha(s) with the aid of Brodsky-Lepage evolution equation. (C) 2009 Elsevier B.V. All rights reserved.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:000265159800011
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被引频次:17[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227002
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
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Jia Y,Jia, Y,Yang, DS. Refactorizing NRQCD short-distance coefficients in exclusive quarkonium production[J]. NUCLEAR PHYSICS B,2009,814(1-2):#REF!.
APA 贾宇,Jia, Y,&Yang, DS.(2009).Refactorizing NRQCD short-distance coefficients in exclusive quarkonium production.NUCLEAR PHYSICS B,814(1-2),#REF!.
MLA 贾宇,et al."Refactorizing NRQCD short-distance coefficients in exclusive quarkonium production".NUCLEAR PHYSICS B 814.1-2(2009):#REF!.
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