Scattering of two and three physical pions at maximal isospin from lattice QCD Extended Twisted Mass Collaboration

doi:10.1140/epjc/s10052-021-09206-5

	Scattering of two and three physical pions at maximal isospin from lattice QCD Extended Twisted Mass Collaboration
	Fischer, Matthias 5,6; Kostrzewa, Bartosz 2; Liu, Liuming 1,7; Romero-Lopez, Fernando 3,4; Ueding, Martin 5,6; Urbach, Carsten 5,6
刊名	EUROPEAN PHYSICAL JOURNAL C
	2021-05-01
卷号	81 期号:5 页码:19
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-021-09206-5
通讯作者	Romero-Lopez, Fernando(fernando.romero@uv.es)
英文摘要	We present the first direct N-f = 2 lattice QCD computation of two- and three-pi(+) scattering quantities that includes an ensemble at the physical point. We study the quark mass dependence of the two-pion phase shift, and the three-particle interaction parameters. We also compare to phenomenology and chiral perturbation theory (ChPT). In the two-particle sector, we observe good agreement to the phenomenological fits in s- and d-wave, and obtain M(pi)a(0) = -0.0481(86) at the physical point from a direct computation. In the three-particle sector, we observe reasonable agreement at threshold to the leading order chiral expansion, i.e. a mildly attractive three-particle contact term. In contrast, we observe that the energy-dependent part of the three-particle quasilocal scattering quantity is not well described by leading order ChPT.
资助项目	DFG[CRC110] ; European projects[H2020-MSCA-ITN-2015/674896-ELUSIVES] ; European projects[H2020-MSCA-RISE-2015/690575-InvisiblesPlus] ; Spanish project[FPA2017-85985-P] ; Generalitat Valenciana[PROMETEO/2019/083] ; EU[713673] ; La Caixa Foundation[100010434] ; La Caixa Foundation[LCF/BQ/IN17/11620044] ; Gauss Centre for Supercomputing e.V.
WOS关键词	QUANTUM-FIELD THEORIES ; PI SCATTERING ; RESONANCE ; AMPLITUDES ; SPECTRUM ; STATES
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000680425500003
资助机构	DFG ; European projects ; Spanish project ; Generalitat Valenciana ; EU ; La Caixa Foundation ; Gauss Centre for Supercomputing e.V.
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136771]
专题	中国科学院近代物理研究所
通讯作者	Romero-Lopez, Fernando
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Univ Bonn, High Performance Comp & Analyt Lab, D-53115 Bonn, Germany 3.Univ Valencia, Inst Fis Corpuscular, Paterna 46980, Spain 4.CSIC, Paterna 46980, Spain 5.Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany 6.Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fischer, Matthias,Kostrzewa, Bartosz,Liu, Liuming,et al. Scattering of two and three physical pions at maximal isospin from lattice QCD Extended Twisted Mass Collaboration[J]. EUROPEAN PHYSICAL JOURNAL C,2021,81(5):19.
APA	Fischer, Matthias,Kostrzewa, Bartosz,Liu, Liuming,Romero-Lopez, Fernando,Ueding, Martin,&Urbach, Carsten.(2021).Scattering of two and three physical pions at maximal isospin from lattice QCD Extended Twisted Mass Collaboration.EUROPEAN PHYSICAL JOURNAL C,81(5),19.
MLA	Fischer, Matthias,et al."Scattering of two and three physical pions at maximal isospin from lattice QCD Extended Twisted Mass Collaboration".EUROPEAN PHYSICAL JOURNAL C 81.5(2021):19.