Electromagnetic Hadron Mass Differences and Estimation of Isotopic Symmetry Violation Parameters of QCD Vacuum from Quark Model

摘要

The estimations of the light quark mass differences, m(sub d) - m(sub u), and the light quark condensate differences, - , are obtained in the framework of the quark model with QCD vacuum induced quark interaction. We consider long-wave condensate and short wave instanton contributions to the electromagnetic hadron mass differences and show that the latter significantly improve the results on baryon octet. The results are :M(sub d) - m(sub u) (approx) 3.5 MeV and - (approx) -(0(approx)) (center dot) 10(sup -3) . (author). 37 refs.; 1 tab. (Atomindex citation 26:012645)