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Статья

Osipov, A.A.
Isospin Symmetry Breaking and Gluon Anomaly / A.A.Osipov. – Text : electronic // International Journal of Modern Physics A. – 2026. – Vol. 41, No. 17. – P. 2650042. – URL: https://doi.org/10.1142/s0217751X26500429. – Bibliogr.: 49.

The contribution of the electromagnetic interaction to the self-energy of pseudo-Goldstone bosons, as well as to the mixing angles and weak decay constants, is calculated in the first nonleading order in the simultaneous expansion in powers of 1∕N&sub(c) , momenta and quark masses. Particular attention is paid to the isospin symmetry breaking which is generated by means of η and η' admixtures to the pion. It is shown that the gluon anomaly enhances the electromagnetic contribution to the π*0-η and π*0-η' mixing angles, which facilitates the restoration of isospin symmetry in the spectrum of pseudo-Goldstone states at next-to-leading order. The contribution of the electromagnetic interaction to the η - η ' mixing angle is shown to be only about 3%.



ОИЯИ = ОИЯИ (JINR)2026
Спец.(статьи,препринты) = С 324.1г - Калибровочные теории поля. Классические и квантовые поля Янга-Миллса. Спонтанно- нарушенные симметрии. Модели Великого объединения$
Бюллетени = 31/026