Supernova Axion Emissivity with $\Delta (1232)$ Resonance in Heavy Baryon Chiral Perturbation Theory

Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko +1

In this paper, we evaluate the energy loss rate of supernovae induced by the axion emission process ${\pi }^{-}+p\to n+a$ with the $\Delta (1232)$ resonance in the heavy baryon chiral pert…