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题名: Delta -> N gamma* Coulomb quadrupole amplitude in PQCD
作者: Idilbi, A ;  Ji, XD ;  Ma, JP
刊名: PHYSICAL REVIEW D
出版日期: 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)
学科分类: Physics
通讯作者: Idilbi, A , Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
部门归属: Univ Maryland, Dept Phys, College Pk, MD 20742 USA; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
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).
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000188785800027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14151
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Idilbi, A,Ji, XD,Ma, JP. Delta -> N gamma* Coulomb quadrupole amplitude in PQCD[J]. PHYSICAL REVIEW D,2004,69(1):-.
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