Breaking scale symmetry and the pion-nucleon sigma-term

1974 ◽  
Vol 10 (18) ◽  
pp. 855-860
Author(s):  
T. Becheekawy ◽  
S. J. Hakim
Keyword(s):  
Sigma Term ◽  
Pion Nucleon ◽  
Breaking Scale

scholarly journals THE NUCLEON MASS AND PION-NUCLEON SIGMA TERM FROM A CHIRAL ANALYSIS OF Nf = 2 + 1 LATTICE QCD WORLD DATA

2014 ◽  
Vol 26 ◽  
pp. 1460089 ◽  
Author(s):  
L. ALVAREZ-RUSO ◽  
T. LEDWIG ◽  
M. J. VICENTE VACAS ◽  
J. MARTIN-CAMALICH
Keyword(s):  
Lattice Qcd ◽  
Degrees Of Freedom ◽  
Pion Mass ◽  
Nucleon Mass ◽  
A Value ◽  
Natural Size ◽  
Sigma Term ◽  
Pion Nucleon ◽  
Pion Mass Dependence ◽  
Energy Constants

Fits of the p4 covariant SU(2) baryon chiral perturbation theory to lattice QCD nucleon mass data from several collaborations for 2 and 2+1 flavors are presented. We consider contributions from explicit Δ(1232) degrees of freedom, finite volume and finite spacing corrections. We emphasize here on our Nf = 2 + 1 study. We obtain low-energy constants of natural size that are compatible with the rather linear pion-mass dependence of the nucleon mass observed in lattice QCD. We report a value of σπN = 41(5)(4) MeV in the 2 flavor case and σπN = 52(3)(8) MeV for 2+1 flavors.

scholarly journals Pion-nucleon sigma term in the global color model of QCD

2005 ◽  
Vol 72 (9) ◽  
Author(s):  
Lei Chang ◽  
Yu-xin Liu ◽  
Hua Guo
Keyword(s):  
Color Model ◽  
Sigma Term ◽  
Pion Nucleon

The pion-nucleon sigma term and threshold parameters

1990 ◽  
Vol 518 (1-2) ◽  
pp. 201-206 ◽  
Author(s):  
M.P. Locher ◽  
M.E. Sainio
Keyword(s):  
Sigma Term ◽  
Pion Nucleon

scholarly journals Pion-Nucleon Sigma Term from Lattice QCD

2021 ◽  
Vol 127 (24) ◽  
Author(s):  
Rajan Gupta ◽  
Sungwoo Park ◽  
Martin Hoferichter ◽  
Emanuele Mereghetti ◽  
Boram Yoon ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Sigma Term ◽  
Pion Nucleon

Evaluation of the pion-nucleon sigma term

1975 ◽  
Vol 57 (2) ◽  
pp. 150-154 ◽  
Author(s):  
Y.A. Chao ◽  
R.E. Cutkosky ◽  
R.L. Kelly ◽  
J.W. Alcock
Keyword(s):  
Sigma Term ◽  
Pion Nucleon
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