CHIRAL LOOPS IN PI-0,ETA-0-]GAMMA-GAMMA AND ETA-ETA' MIXING
Journal or Book Title
PHYSICAL REVIEW LETTERS
We compute the one-loop corrections to the Wess-Zumino Lagrangean governing π0, η8→γγ. The SU(3) relation between the two decay rates receives modifications of order mK2lnmK2, as does the Gell-Mann-Okubo mass formula. A consistent picture of η-η′ mixing emerges from both the two-photon widths and the mass matrix, however with a mixing angle θ≈-20° instead of the usual θ≈-10°.
Donoghue, JF; Holstein, BR; and LIN, YCR, "CHIRAL LOOPS IN PI-0,ETA-0-]GAMMA-GAMMA AND ETA-ETA' MIXING" (1985). PHYSICAL REVIEW LETTERS. 194.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/194
Published version is located at http://prl.aps.org/abstract/PRL/v55/i25/p2766_1