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Idilbi, A; Ji, XD; Ma, JP; Idilbi, A , Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
Delta -> N gamma* Coulomb quadrupole amplitude in PQCD
发表期刊PHYSICAL REVIEW D
关键词Transition Form-factors Single Pion Photoproduction Exclusive Processes Quark Model Quantum Chromodynamics Exchange Currents Momentum-transfer Perturbative Qcd Nucleon Delta(1232)
摘要We present a leading-order PQCD factorization formula for the helicity-flip Delta-->Ngamma(*) matrix element G(0) (Coulomb quadrupole amplitude C2), taking into account the transverse momenta of the quarks and the contribution from the gluons. In the large Q(2) limit, its scaling behavior acquires a double-logarithmic correction log(2)(Q(2)/Lambda(2)) compared with the standard scaling analysis, due to the contribution from the orbital motion of the small-x partons. Based on this and on the latest JLab experimental results of the C2-M1 ratio R-SM at Q(2)=3-4 GeV2, we make a phenomenological prediction for the latter at higher values of Q(2).
2004
ISSN0556-2821
卷号69期号:1页码:-
学科领域Physics
收录类别SCI
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被引频次:19[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/311006/14151
专题理论物理所科研产出_SCI论文
通讯作者Idilbi, A , Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
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Idilbi, A,Ji, XD,Ma, JP,et al. Delta -> N gamma* Coulomb quadrupole amplitude in PQCD[J]. PHYSICAL REVIEW D,2004,69(1):-.
APA Idilbi, A,Ji, XD,Ma, JP,&Idilbi, A , Univ Maryland, Dept Phys, College Pk, MD 20742 USA..(2004).Delta -> N gamma* Coulomb quadrupole amplitude in PQCD.PHYSICAL REVIEW D,69(1),-.
MLA Idilbi, A,et al."Delta -> N gamma* Coulomb quadrupole amplitude in PQCD".PHYSICAL REVIEW D 69.1(2004):-.
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