Delta -> N gamma* Coulomb quadrupole amplitude in PQCD

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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.
刊名	PHYSICAL REVIEW D
	2004
卷号	69 期号:1 页码:-
关键词	Transition Form-factors Single Pion Photoproduction Exclusive Processes Quark Model Quantum Chromodynamics Exchange Currents Momentum-transfer Perturbative Qcd Nucleon Delta(1232)
ISSN号	0556-2821
英文摘要	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).
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000188785800027
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14151]
专题	理论物理研究所_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.
推荐引用方式 GB/T 7714	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):-.