On the constituent counting rule for hard exclusive processes involving multi-quark states

doi:http://dx.doi.org/10.1088/1674-1137/41/5/053108

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	On the constituent counting rule for hard exclusive processes involving multi-quark states
	Wang, W; Guo, FK; Meissner, UG; Wang, W (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai Key Lab Particle Phys & Cosmol, INPAC, Shanghai 200240, Peoples R China.
刊名	CHINESE PHYSICS C
	2017
卷号	41 期号:5 页码:53108
关键词	Hadron Exotics Constituent Scaling Rule Effective Field Theory
DOI	http://dx.doi.org/10.1088/1674-1137/41/5/053108
英文摘要	At high energy, the cross section at finite scattering angle of a hard exclusive process falls off as a power of the Manderstam variable s. If all involved quark-gluon compositions undergo hard momentum transfers, the fall-off scaling is determined by the underlying valence structures of the initial and final hadrons, known as the constituent counting rule. In spite of the complication due to helicity conservation, it has been argued that when applied to exclusive process with exotic multiquark states, the counting rule is a powerful way to determine the valence degrees of freedom inside hadron exotics. In this work, we demonstrate that for hadrons with hidden flavors, the naive application of the constituent counting rule is problematic, since it is not mandatory for all components to participate in hard scattering at the scale We illustrate the problems in the viewpoint based on effective field theory. We clarify the misleading results that may be obtained from the constituent counting rule in exclusive processes with exotic candidates such as Z(c)(+/-)((c) over barc (u) over bard/(c) over barc (d) over baru), Z(b)(+/-)((b) over barb (u) over bard/(b) over barb (d) over baru), X(3872), etc.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22062]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Wang, W (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai Key Lab Particle Phys & Cosmol, INPAC, Shanghai 200240, Peoples R China.
推荐引用方式 GB/T 7714	Wang, W,Guo, FK,Meissner, UG,et al. On the constituent counting rule for hard exclusive processes involving multi-quark states[J]. CHINESE PHYSICS C,2017,41(5):53108.
APA	Wang, W,Guo, FK,Meissner, UG,&Wang, W .(2017).On the constituent counting rule for hard exclusive processes involving multi-quark states.CHINESE PHYSICS C,41(5),53108.
MLA	Wang, W,et al."On the constituent counting rule for hard exclusive processes involving multi-quark states".CHINESE PHYSICS C 41.5(2017):53108.