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EnglishWe consider the problem of axion production by bremsstrahlung emission in a nuclear medium. The usual assumption of a massless axion is replaced by more general hypotheses, so that we can describe the emission process for axions with mass up to a few MeV. We point out that in certain physical situations the contribution from nonzero mass is non-negligible. In particular, in the mechanism for the production of gamma ray bursts via emission of heavy axions the axion mass (ma 1 MeV) is comparable with the temperature of the nuclear medium, and thus can not be disregarded. Looking at our results we find, in fact, a fairly considerable reduction of the axion luminosity in that mechanism.
| Titolo: | Nucleon-nucleon Bremsstrahlung emission of massive axions |
| Autori: | |
| Data di pubblicazione: | 2005 |
| Rivista: | |
| Abstract: | We consider the problem of axion production by bremsstrahlung emission in a nuclear medium. The usual assumption of a massless axion is replaced by more general hypotheses, so that we can describe the emission process for axions with mass up to a few MeV. We point out that in certain physical situations the contribution from nonzero mass is non-negligible. In particular, in the mechanism for the production of gamma ray bursts via emission of heavy axions the axion mass (ma 1 MeV) is comparable with the temperature of the nuclear medium, and thus can not be disregarded. Looking at our results we find, in fact, a fairly considerable reduction of the axion luminosity in that mechanism. |
| Handle: | http://hdl.handle.net/11368/2900796 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.72.063005 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |