Sigma-term physics in the perturbative chiral quark model

V. E. Lyubovitskij, Th Gutsche, Amand Faessler, E. G. Drukarev

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

We apply the perturbative chiral quark model at one loop to analyze meson-baryon sigma terms. Analytic expressions for these quantities are obtained in terms of fundamental parameters of low-energy pion-nucleon physics (weak pion decay constant, axial nucléon coupling, strong pion-nucleon form factor) and of only one model parameter (radius of the nucleonic three-quark core). Our result for the πN sigma term σπN ≈45 MeV is in good agreement with the value deduced by Gasser, Leutwyler, and Sainio using dispersionrelation techniques and exploiting the chiral symmetry constraints.

Original languageEnglish
Article number054026
JournalPhysical Review D
Volume63
Issue number5
DOIs
Publication statusPublished - 2001
Externally publishedYes

Fingerprint

quark models
Quarks
pions
Physics
physics
Chiral Symmetry
Form Factors
Term
Baryon
Strong Coupling
Mesons
nucleonics
Radius
Decay
form factors
baryons
mesons
Energy
Model
quarks

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Sigma-term physics in the perturbative chiral quark model. / Lyubovitskij, V. E.; Gutsche, Th; Faessler, Amand; Drukarev, E. G.

In: Physical Review D, Vol. 63, No. 5, 054026, 2001.

Research output: Contribution to journalArticle

Lyubovitskij, V. E. ; Gutsche, Th ; Faessler, Amand ; Drukarev, E. G. / Sigma-term physics in the perturbative chiral quark model. In: Physical Review D. 2001 ; Vol. 63, No. 5.
@article{a3e9fe02c6874f118c2e13b359e22366,
title = "Sigma-term physics in the perturbative chiral quark model",
abstract = "We apply the perturbative chiral quark model at one loop to analyze meson-baryon sigma terms. Analytic expressions for these quantities are obtained in terms of fundamental parameters of low-energy pion-nucleon physics (weak pion decay constant, axial nucl{\'e}on coupling, strong pion-nucleon form factor) and of only one model parameter (radius of the nucleonic three-quark core). Our result for the πN sigma term σπN ≈45 MeV is in good agreement with the value deduced by Gasser, Leutwyler, and Sainio using dispersionrelation techniques and exploiting the chiral symmetry constraints.",
author = "Lyubovitskij, {V. E.} and Th Gutsche and Amand Faessler and Drukarev, {E. G.}",
year = "2001",
doi = "10.1103/PhysRevD.63.054026",
language = "English",
volume = "63",
journal = "Physical review D: Particles and fields",
issn = "1550-7998",
publisher = "American Institute of Physics Publising LLC",
number = "5",

}

TY - JOUR

T1 - Sigma-term physics in the perturbative chiral quark model

AU - Lyubovitskij, V. E.

AU - Gutsche, Th

AU - Faessler, Amand

AU - Drukarev, E. G.

PY - 2001

Y1 - 2001

N2 - We apply the perturbative chiral quark model at one loop to analyze meson-baryon sigma terms. Analytic expressions for these quantities are obtained in terms of fundamental parameters of low-energy pion-nucleon physics (weak pion decay constant, axial nucléon coupling, strong pion-nucleon form factor) and of only one model parameter (radius of the nucleonic three-quark core). Our result for the πN sigma term σπN ≈45 MeV is in good agreement with the value deduced by Gasser, Leutwyler, and Sainio using dispersionrelation techniques and exploiting the chiral symmetry constraints.

AB - We apply the perturbative chiral quark model at one loop to analyze meson-baryon sigma terms. Analytic expressions for these quantities are obtained in terms of fundamental parameters of low-energy pion-nucleon physics (weak pion decay constant, axial nucléon coupling, strong pion-nucleon form factor) and of only one model parameter (radius of the nucleonic three-quark core). Our result for the πN sigma term σπN ≈45 MeV is in good agreement with the value deduced by Gasser, Leutwyler, and Sainio using dispersionrelation techniques and exploiting the chiral symmetry constraints.

UR - http://www.scopus.com/inward/record.url?scp=0034907628&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034907628&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.63.054026

DO - 10.1103/PhysRevD.63.054026

M3 - Article

VL - 63

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 5

M1 - 054026

ER -