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 > 理论物理所科研产出 > SCI论文

	Chen, HY; Zhou, HQ; Zhou, HQ (reprint author), Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China.
	Meson exchange effects in elastic ep scattering at loop level and the electromagnetic form factors of the proton
发表期刊	PHYSICAL REVIEW C
语种	英语
关键词	2-photon-exchange
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.
	2014
ISSN	0556-2813
卷号	90 期号:4 页码:45205
学科领域	Physics
DOI	10.1103/PhysRevC.90.045205
收录类别	SCI
项目资助者	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]
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	理论物理所科研产出_SCI论文
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.