Coupled ππ, K(K)over-bar scattering in P-wave and the ρ resonance from lattice QCD

被引：165

作者：

Wilson, David J. ^{[1
]}

Briceno, Raul A. ^{[2
]}

Dudek, Jozef J. ^{[1
,2
]}

Edwards, Robert G. ^{[2
]}

Thomas, Christopher E. ^{[3
]}

机构：

[1] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA

[2] Jefferson Lab, Ctr Theory, Newport News, VA 23606 USA

[3] Univ Cambridge, Ctr Math Sci, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 09期

基金：

英国科学技术设施理事会; 美国国家科学基金会;

关键词：

STATES;

D O I：

10.1103/PhysRevD.92.094502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We determine elastic and coupled-channel amplitudes for isospin-1 meson-meson scattering in P wave, by calculating correlation functions using lattice QCD with light quark masses such that m(pi) = 236 MeV in a cubic volume of similar to(4 fm)(3). Variational analyses of large matrices of correlation functions computed using operator constructions resembling pi pi, K (K) over bar and q (q) over bar, in several moving frames and several lattice irreducible representations, lead to discrete energy spectra from which scattering amplitudes are extracted. In the elastic pp scattering region we obtain a detailed energy dependence for the phase shift, corresponding to a. resonance, and we extend the analysis into the coupled-channel K (K) over bar region for the first time, finding a small coupling between the channels.

引用

页数：14

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