scholarly journals Strange quark contributions to nucleon mass and spin from lattice QCD

2012 ◽  
Vol 86 (11) ◽  
Author(s):  
M. Engelhardt
Keyword(s):  
Lattice Qcd ◽  
Strange Quark ◽  
Nucleon Mass

scholarly journals The nucleon mass in Nf=2 lattice QCD: finite size effects from chiral perturbation theory

2004 ◽  
Vol 689 (3) ◽  
pp. 175-194 ◽  
Author(s):  
A. Ali Khan ◽  
T. Bakeyev ◽  
M. Göckeler ◽  
T.R. Hemmert ◽  
R. Horsley ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Lattice Qcd ◽  
Chiral Perturbation Theory ◽  
Size Effects ◽  
Finite Size ◽  
Nucleon Mass ◽  
Chiral Perturbation ◽  
Finite Size Effects

scholarly journals Nucleon sigma term and strange quark content from lattice QCD with exact chiral symmetry

2008 ◽  
Vol 78 (5) ◽  
Author(s):  
H. Ohki ◽  
H. Fukaya ◽  
S. Hashimoto ◽  
T. Kaneko ◽  
H. Matsufuru ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Chiral Symmetry ◽  
Strange Quark ◽  
Sigma Term ◽  
Quark Content

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 Quark, pion and axial condensates in three-flavor finite isospin chiral perturbation theory

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Prabal Adhikari ◽  
Jens O. Andersen ◽  
Martin A. Mojahed
Keyword(s):  
Perturbation Theory ◽  
Lattice Qcd ◽  
Chiral Perturbation Theory ◽  
Strange Quark ◽  
Chemical Potential ◽  
Light Quark ◽  
Quark Condensate ◽  
Lattice Data ◽  
Chiral Perturbation ◽  
Good Agreement

AbstractWe calculate the light-quark condensate, the strange-quark condensate, the pion condensate, and the axial condensate in three-flavor chiral perturbation theory ($$\chi $$ χ PT) in the presence of an isospin chemical potential at next-to-leading order at zero temperature. It is shown that the three-flavor $$\chi $$ χ PT effective potential and condensates can be mapped onto two-flavor $$\chi $$ χ PT ones by integrating out mesons with strange-quark content (kaons and eta), with renormalized couplings. We compare the results for the light-quark and pion condensates at finite pseudoscalar source with ($$2+1$$ 2 + 1 )-flavor lattice QCD, and we also compare the axial condensate at zero pseudoscalar and axial sources with lattice QCD data. We find that the light-quark, pion, and axial condensates are in very good agreement with lattice data. There is an overall improvement by including NLO effects.

scholarly journals Nucleon mass and pion-nucleon sigma term from a chiral analysis of lattice QCD world data

2014 ◽  
Vol 73 ◽  
pp. 04015 ◽  
Author(s):  
L. Alvarez-Ruso ◽  
T. Ledwig ◽  
J. Martin Camalich ◽  
M.J. Vicente Vacas
Keyword(s):  
Lattice Qcd ◽  
Chiral Analysis ◽  
Nucleon Mass ◽  
World Data ◽  
Sigma Term ◽  
Pion Nucleon

scholarly journals Nucleon mass, sigma term, and lattice QCD

2004 ◽  
Vol 69 (3) ◽  
Author(s):  
Massimiliano Procura ◽  
Thomas R. Hemmert ◽  
Wolfram Weise
Keyword(s):  
Lattice Qcd ◽  
Nucleon Mass ◽  
Sigma Term

scholarly journals Nucleon strange quark content from two-flavor lattice QCD with exact chiral symmetry

2011 ◽  
Vol 83 (11) ◽  
Author(s):  
K. Takeda ◽  
S. Aoki ◽  
S. Hashimoto ◽  
T. Kaneko ◽  
J. Noaki ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Chiral Symmetry ◽  
Strange Quark ◽  
Quark Content

scholarly journals Lattice QCD with a twisted mass term and a strange quark

2008 ◽  
pp. 473-476
Author(s):  
A. M. Abdel-Rehim ◽  
R. Lewis ◽  
R. M. Woloshyn ◽  
J. M. S. Wu
Keyword(s):  
Lattice Qcd ◽  
Strange Quark ◽  
Mass Term ◽  
Twisted Mass
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