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Delta -> N gamma* Coulomb quadrupole amplitude in PQCD
Idilbi, A; Ji, XD; Ma, JP; Idilbi, A , Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
2004
发表期刊PHYSICAL REVIEW D
ISSN0556-2821
卷号69期号:1页码:-
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).
部门归属Univ Maryland, Dept Phys, College Pk, MD 20742 USA; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Transition Form-factors Single Pion Photoproduction Exclusive Processes Quark Model Quantum Chromodynamics Exchange Currents Momentum-transfer Perturbative Qcd Nucleon Delta(1232)
学科领域Physics
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收录类别SCI
WOS记录号WOS:000188785800027
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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1978-2010年知识产出
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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