Isospin-breaking contribution to the model-independent axion-photon-photon coupling in U(3) chiral theory
Abstract We pursue the calculation of the model-independent component of the axion-photon-photon coupling in the U(3) chiral perturbation theory up to next-to-leading order, with the emphasis on the isospin breaking effect. The mixing of the $$\pi ^0$$ π 0 - $$\eta $$ η - $$\eta '$$ η ′ -axion...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13807-9 |
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