Preserving local gauge invariance with t-channel Regge exchange

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	Preserving local gauge invariance with t-channel Regge exchange
	Haberzettl, H; Wang, XY; He, J
刊名	PHYSICAL REVIEW C
	2015
卷号	92 期号:5 页码:55503
通讯作者	Haberzettl, H (reprint author), George Washington Univ, Inst Nucl Studies, Washington, DC 20052 USA.
英文摘要	Considering single-meson photo-and electroproduction off a baryon, it is shown how to restore local gauge invariance that was broken by replacing standard Feynman-type meson exchange in the t channel by exchange of a Regge trajectory. This is achieved by constructing a contact current whose four-divergence cancels the gauge-invariance-violating contributions resulting from all states above the base state on the Regge trajectory. To illustrate the procedure, modifications necessary for the process gamma + p -> K+ + Sigma(*0) are discussed in some detail. We also provide the general expression for the contact current for an arbitrary reaction.
学科主题	Physics
类目[WOS]	Physics, Nuclear
关键词[WOS]	PHOTOPRODUCTION ; NUCLEON ; LAMBDA ; PION
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20789]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Haberzettl, H,Wang, XY,He, J. Preserving local gauge invariance with t-channel Regge exchange[J]. PHYSICAL REVIEW C,2015,92(5):55503.
APA	Haberzettl, H,Wang, XY,&He, J.(2015).Preserving local gauge invariance with t-channel Regge exchange.PHYSICAL REVIEW C,92(5),55503.
MLA	Haberzettl, H,et al."Preserving local gauge invariance with t-channel Regge exchange".PHYSICAL REVIEW C 92.5(2015):55503.