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- W4362599870 abstract "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 perturbation theory for the first time. Given the axion-nucleon-$Delta$ interactions, we include the previously ignored $Delta$-mediated graphs to the $pi^- + p to n + a$ process. In particular, the $Delta^0$-mediated diagram can give a resonance contribution to the supernova axion emission rate when the center-of-mass energy of the pion and proton approaches the $Delta(1232)$ mass. With these new contributions, we find that for the typical supernova temperatures, compared with the earlier work with the axion-nucleon (and axion-pion-nucleon contact) interactions, the supernova axion emissivity can be enhanced by a factor of $sim$4(2) in the Kim-Shifman-Vainshtein-Zakharov model and up to a factor of $sim$5(2) in the Dine-Fischler-Srednicki-Zhitnitsky model with small $tanbeta$ values. Remarkably, we notice that the $Delta(1232)$ resonance gives a destructive contribution to the supernova axion emission rate at high supernova temperatures, which is a nontrivial result in this study." @default.
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- W4362599870 date "2023-04-04" @default.
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- W4362599870 title "Supernova axion emissivity with <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=normal>Δ</mml:mi><mml:mo stretchy=false>(</mml:mo><mml:mn>1232</mml:mn><mml:mo stretchy=false>)</mml:mo></mml:math> resonance in heavy baryon chiral perturbation theory" @default.
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- W4362599870 doi "https://doi.org/10.1103/physrevd.107.075002" @default.
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