Studying the ρ resonance parameters with staggered fermions

被引：42

作者：

Fu, Ziwen ^{[1
,2
]}

Wang, Lingyun ^{[3
]}

机构：

[1] Inst Nucl Sci & Technol, Educ Minist, Key Lab Radiat Phys & Technol, Chengdu 610064, Peoples R China

[2] Sichuan Univ, Coll Phys Sci & Technol, Ctr Theoret Phys, Chengdu 610064, Peoples R China

[3] Chengdu Jiaxiang Foreign Language Sch, Dept Int Affairs, Chengdu 610023, Peoples R China

来源：

PHYSICAL REVIEW D | 2016年 / 94卷 / 03期

关键词：

CHIRAL PERTURBATION-THEORY; FINITE-VOLUME; VECTOR-MESON; LATTICE QCD; DECAY; STATES; SIMULATIONS; ANOMALIES; FLAVORS;

D O I：

10.1103/PhysRevD.94.034505

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We deliver a lattice study of rho resonance parameters with p-wave pi pi scattering phases, which are extracted by finite-size methods at one center-of-mass frame and four moving frames for six lattice ensembles from the MILC Collaboration with pion masses ranging from 346 to 176 MeV. The effective range formula is applied to describe the scattering phases as a function of the energy covering the resonance region; this allows us to extract rho resonance parameters and to investigate the quark-mass dependence. Lattice studies with three flavors of Asqtad-improved staggered fermions enable us to use the moving-wall source technique on large lattice spatial dimensions (L = 64) and small light u/d quarks. Numerical computations are carried out at two lattice spacings, a approximate to 0.12 and 0.09 fm.

引用

页数：21

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