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arXiv · hep-ph/0409185

Mirror World, Supersymmetric Axion and Gamma Ray Bursts

L. Gianfagna·M. Giannotti·F. Nesti
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Abstract

A modification of the relation between axion mass and the PQ constant permits a relaxation of the astrophysical constraints, considerably enlarging the allowed axion parameter space. We develop this idea in this paper, discussing a model for an {\it ultramassive} axion, which essentially represents a supersymmetric Weinberg-Wilczek axion of the mirror world. The experimental and astrophysical limits allow a PQ scale f_a ~ 10^4-10^6 GeV and a mass m_a ~ 1MeV, which can be accessible for future experiments. On a phenomenological ground, such an {\it ultramassive} axion turns out to be quite interesting. It can be produced during the gravitational collapse or during the merging of two compact objects, and its subsequent decay into e+e- provides an efficient mechanism for the transfer of the gravitational energy of the collapsing system to the electron-positron plasma. This could resolve the energy budget problem in the Gamma Ray Bursts and also help in understanding the SN type II explosion phenomena.

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L. Gianfagna, M. Giannotti, F. Nesti. 2004-09-28. Mirror World, Supersymmetric Axion and Gamma Ray Bursts. https://doi.org/10.1088/1126-6708%2F2004%2F10%2F044

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