Author
Erkol, Güray, Oka, M., Takahashi, T. T.
Publication Date
2009-04-01
Publication Place
-
American Physical Society
Subject
Meson-baryon coupling constant, Hyperon axial charge, Lattice QCD
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
2-s2.0-66349092449
Record ID
70ec4f5e-4de6-4269-be4b-40be0ba8b43e
Library Location
Natural and Mathematical Sciences
Date
2009-04-01
Sample Text
We evaluate the πΝΝ, π∑∑, πΛ∑, KΛN and K∑N coupling constants and the corresponding monopole masses in lattice QCD with two flavors of dynamical quarks. The parameters representing the SU(3)-flavor symmetry are computed at the point where the three quark flavors are degenerate at the physical s-quark mass. In particular, we obtain α ≡ F/(F+D) = 0.395(6). The quark-mass dependences of the coupling constants are obtained by changing the u- and the d-quark masses. We find that the SU(3)-flavor parameters have weak quark-mass dependence and thus the SU(3)-flavor symmetry is brokenby only a few percent at each quark-mass point we consider.
DOI
10.1103/PhysRevD.79.074509
Cilt
79
