Constraints on disconnected contributions in pi pi scattering

doi:10.1007/JHEP04(2019)165

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	Constraints on disconnected contributions in pi pi scattering
	Acharya, NR ; Guo, FK ; Meissner, UG ; Seng, CY
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2019
期号	4 页码:165
关键词	LENGTH
ISSN号	1029-8479
DOI	10.1007/JHEP04(2019)165
英文摘要	The accuracy of the lattice QCD computation of hadron-hadron scattering at low isospin depends critically on the ability to compute correlation functions with fermionic disconnected Wick contractions. This happens, for instance, in isospin I = 0 pi pi scattering, which receives contributions from rectangular and vacuum types of contractions among other easier calculable ones. Combining Luscher's formula and partially-quenched chiral perturbation theory, we provide precise theory predictions of the discrete energy levels extracted from specific linear combinations of lattice correlation functions corresponding to various types of contractions. Expressions are provided for extracting the unphysical low-energy constants in the partially-quenched chiral perturbation theory from the energy levels for these contractions. The predictions for the rectangular and vacuum contractions may serve as solid tests of the accuracy for existing and future lattice studies of pi pi scattering.
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/311006/23445]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 2.[Meissner, Ulf-G.] Tbilisi State Univ, Tbilisi 0186, Rep of Georgia 3.[Meissner, Ulf-G.] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany 4.[Acharya, N. Ripunjay 5.Meissner, Ulf-G. 6.Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany 7.Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany 8.Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China 9.[Meissner, Ulf-G.] Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany
推荐引用方式 GB/T 7714	Acharya, NR,Guo, FK,Meissner, UG,et al. Constraints on disconnected contributions in pi pi scattering[J]. JOURNAL OF HIGH ENERGY PHYSICS,2019(4):165.
APA	Acharya, NR,Guo, FK,Meissner, UG,&Seng, CY.(2019).Constraints on disconnected contributions in pi pi scattering.JOURNAL OF HIGH ENERGY PHYSICS(4),165.
MLA	Acharya, NR,et al."Constraints on disconnected contributions in pi pi scattering".JOURNAL OF HIGH ENERGY PHYSICS .4(2019):165.