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	Connected and disconnected contractions in pion-pion scattering
	Seng, CY; Acharya, NR; Guo, FK; Meissner, UG; Seng, CY (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, INPAC, Shanghai 200240, Shanghai, Peoples R China.
刊名	NUCLEAR PHYSICS B
	2017
卷号	922页码:480-498
DOI	http://dx.doi.org/10.1016/j.nuclphysb.2017.07.012
英文摘要	We show that the interplay of chiral effective field theory and lattice QCD can be used in the evaluation of so-called disconnected diagrams, which appear in the study of the isoscalar and isovector channels of pion-pion scattering and have long been a major challenge for the lattice community. By means of partially-quenched chiral perturbation theory, we distinguish and analyze the effects from different types of contraction diagrams to the pion-pion scattering amplitude, including its scattering lengths and the energy-dependence of its imaginary part. Our results may be used to test the current degree of accuracy of lattice calculation in the handling of disconnected diagrams, as well as to set criteria for the future improvement of relevant lattice computational techniques that may play a critical role in the study of other interesting QCD matrix elements. (C) 2017 The Author(s). Published by Elsevier B.V.
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/311006/21979]
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	Seng, CY (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, INPAC, Shanghai 200240, Shanghai, Peoples R China.
推荐引用方式 GB/T 7714	Seng, CY,Acharya, NR,Guo, FK,et al. Connected and disconnected contractions in pion-pion scattering[J]. NUCLEAR PHYSICS B,2017,922:480-498.
APA	Seng, CY,Acharya, NR,Guo, FK,Meissner, UG,&Seng, CY .(2017).Connected and disconnected contractions in pion-pion scattering.NUCLEAR PHYSICS B,922,480-498.
MLA	Seng, CY,et al."Connected and disconnected contractions in pion-pion scattering".NUCLEAR PHYSICS B 922(2017):480-498.

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