Low-energy limit of the extended Linear Sigma Model

被引：14

作者：

Divotgey, Florian ^{[1
]}

Kovacs, Peter ^{[2
,3
]}

Giacosa, Francesco ^{[1
,4
]}

Rischke, Dirk H. ^{[1
,5
,6
]}

机构：

[1] Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[2] Hungarian Acad Sci, Wigner Res Ctr Phys, Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

[3] GSI Helmholtzzentrum Schwerionenforsch, ExtreMe Matter Inst, Planckstr 1, D-64291 Darmstadt, Germany

[4] Jan Kochanowski Univ, Inst Phys, Ul Swietokrzyska 15, PL-25406 Kielce, Poland

[5] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Study, Hefei 230026, Anhui, Peoples R China

[6] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL A | 2018年 / 54卷 / 01期

关键词：

CHIRAL PERTURBATION-THEORY; MULTIQUARK HADRONS; MESONS; PHENOMENOLOGY; VECTOR; SCALAR;

D O I：

10.1140/epja/i2018-12458-9

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：

The extended Linear Sigma Model is an effective hadronic model based on the linear realization of chiral symmetry SU(N-f)(L) x SU(N-f)(R), with (pseudo) scalar and (axial-) vector mesons as degrees of freedom. In this paper, we study the low-energy limit of the extended Linear Sigma Model (eLSM) for N-f = 2 flavors by integrating out all fields except for the pions, the (pseudo-)Nambu-Goldstone bosons of chiral symmetry breaking. The resulting low-energy effective action is identical to Chiral Perturbation Theory (ChPT) after choosing a representative for the coset space generated by chiral symmetry breaking and expanding it in powers of (derivatives of) the pion fields. The tree-level values of the coupling constants of the effective low-energy action agree remarkably well with those of ChPT.

引用

页数：14

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