Meson exchange effects in elastic ep scattering at loop level and the electromagnetic form factors of the proton

doi:10.1103/PhysRevC.90.045205

ITP OpenIR > 理论物理所2014年知识产出

	Meson exchange effects in elastic ep scattering at loop level and the electromagnetic form factors of the proton
	Chen, HY; Zhou, HQ; Zhou, HQ (reprint author), Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China.
	2014
发表期刊	PHYSICAL REVIEW C
ISSN	0556-2813
卷号	90 期号:4 页码:45205
摘要	A new form of two-photon exchange (TPE) effect is studied to explain the discrepancy between unpolarized and polarized experimental data in elastic ep scattering. The mechanism is based on a simple idea that apart from the usual TPE effects from box and crossed-box diagrams, the mesons may also be exchanged in elastic ep scattering by two-photon coupling at loop level. The detailed study shows such contributions to reduced unpolarized cross section (sigma(un)) and polarized observables (P-t, P-l) at fixed Q(2) are only dependent on proton's electromagnetic form factors G(E,M) and a new unknown universal parameter g. After combining this contribution with the usual TPE contributions from box and crossed-box diagrams, the ratio mu(p)G(E)/G(M) extracted from the recent precise unpolarized and polarized experimental data can be described consistently.
部门归属	[Chen, Hong-Yu ; Zhou, Hai-Qing] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China ; [Zhou, Hai-Qing] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
关键词	2-photon-exchange
学科领域	Physics
资助者	National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012] ; National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012] ; National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012] ; National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012]
DOI	10.1103/PhysRevC.90.045205
URL	查看原文
收录类别	SCI
语种	英语
资助者	National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012] ; National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012] ; National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012] ; National Sciences Foundations of China [11375044]; Fundamental Research Funds for the Central Universities [2242014R30012]
WOS记录号	WOS:000344026700002
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/15619
专题	理论物理所2014年知识产出
通讯作者	Zhou, HQ (reprint author), Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China.
推荐引用方式 GB/T 7714	Chen, HY,Zhou, HQ,Zhou, HQ . Meson exchange effects in elastic ep scattering at loop level and the electromagnetic form factors of the proton[J]. PHYSICAL REVIEW C,2014,90(4):45205.
APA	Chen, HY,Zhou, HQ,&Zhou, HQ .(2014).Meson exchange effects in elastic ep scattering at loop level and the electromagnetic form factors of the proton.PHYSICAL REVIEW C,90(4),45205.
MLA	Chen, HY,et al."Meson exchange effects in elastic ep scattering at loop level and the electromagnetic form factors of the proton".PHYSICAL REVIEW C 90.4(2014):45205.