Abstract
The leading non analytic chiral corrections to the mass of the invisible axion and to the parameters describing its mixing with the pion and the eta are calculated. It is found that these corrections are much smaller than expected on the basis of order of magnitude estimates. The correction to the decay width into two photons is also found to be negligible.
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Spaliński, M. Chiral corrections to the axion mass. Z. Phys. C - Particles and Fields 41, 87–90 (1988). https://doi.org/10.1007/BF01412582
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DOI: https://doi.org/10.1007/BF01412582