ρ and K* resonances on the lattice at nearly physical quark masses and Nf=2

被引：72

作者：

Bali, Gunnar S. ^{[1
,2
]}

Collins, Sara ^{[1
]}

Cox, Antonio ^{[1
]}

Donald, Gordon ^{[1
]}

Goeckeler, Meinulf ^{[1
]}

Lang, C. B. ^{[3
]}

Schaefer, Andreas ^{[1
]}

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[2] Tata Inst Fundamental Res, Homi Bhabha Rd, Bombay 400005, Maharashtra, India

[3] Graz Univ, Inst Phys, A-8010 Graz, Austria

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 05期

关键词：

QUANTUM-FIELD THEORIES; STATES; SPECTRUM; MESON; DECAY;

D O I：

10.1103/PhysRevD.93.054509

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Working with a pion mass m(pi) approximate to 150 MeV, we study pi pi and K-pi scattering using two flavors of nonperturbatively improved Wilson fermions at a lattice spacing a approximate to 0.071 fm. Employing two lattice volumes with linear spatial extents of N-s = 48 and N-s = 64 points and moving frames, we extract the phase shifts for p-wave pi pi and K pi scattering near the rho and K* resonances. Comparing our results to those of previous lattice studies, that used pion masses ranging from about 200 MeV up to 470 MeV, we find that the coupling g(rho pi pi) appears to be remarkably constant as a function of m(pi).

引用

页数：15

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