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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
Source PublicationPHYSICAL REVIEW D
KeywordTransition Form-factors Single Pion Photoproduction Exclusive Processes Quark Model Quantum Chromodynamics Exchange Currents Momentum-transfer Perturbative Qcd Nucleon Delta(1232)
AbstractWe 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
Volume69Issue:1Pages:-
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14151
Collection理论物理所科研产出_SCI论文
Corresponding AuthorIdilbi, A , Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
Recommended Citation
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):-.
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