On light vector mesons and chiral SU(3) extrapolations

被引：11

作者：

Guo, Xiao-Yu ^{[1
]}

Lutz, M. F. M. ^{[1
,2
]}

机构：

[1] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planck Str 1, D-64291 Darmstadt, Germany

[2] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

来源：

NUCLEAR PHYSICS A | 2019年 / 988卷

关键词：

Chiral symmetry; Lattice QCD; Effective field theory; Vector meosns;

D O I：

10.1016/j.nuclphysa.2019.02.007

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

A chiral extrapolation of the light vector meson masses in the up, down and strange quark masses of QCD is presented. We apply an effective chiral Lagrangian based on the hadrogenesis conjecture to QCD lattice ensembles of PACS-CS, QCDSF-UKQCD and HSC in the strict isospin limit. The leading orders low-energy constants are determined upon a global fit to the lattice data set. We use the pion and kaon masses as well as the size of the finite volume as lattice ensemble parameters only. The quark mass ratio on the various ensembles are then predicted in terms of our set of low-energy constants. An accurate re-production of the vector meson masses and quark-mass ratios as provided by the lattice collaborations and the Particle Data Group (PDG) is achieved. Particular attention is paid to the omega - phi mixing phenomenon, which is demonstrated to show a strong quark mass dependence. (C) 2019 Published by Elsevier B.V.

引用

页码：48 / 58

页数：11

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