Maximum Entropy Inferences on the Axion Mass in Models with Axion-Neutrino Interaction

Date
2017Author
Alves, Alexandre [UNIFESP]
Dias, Alex Gomes
da Silva, Roberto
Type
ArtigoISSN
0103-9733DOI
10.1007/s13538-017-0515-yMetadata
Show full item recordAbstract
In this work, we use the maximum entropy principle (MEP) to infer the mass of an axion which interacts to photons and neutrinos in an effective low energy theory. The Shannon entropy function to be maximized is defined in terms of the axion branching ratios. We show that MEP strongly constrains the axion mass taking into account the current experimental bounds on the neutrinos masses. Assuming that the axion is massive enough to decay into all the three neutrinos and that MEP fixes all the free parameters of the model, the inferred axion mass is in the interval 0.1 eV < m(A) < 0.2 eV, which can be tested by forthcoming experiments such as IAXO. However, even in the case where MEP fixes just the axion mass and no other parameter, we found that 0.1 eV < m(A) < 6.3 eV in the DFSZ model with right-handed neutrinos. Moreover, a light axion, allowed to decay to photons and the lightest neutrino only, is determined by MEP as a viable dark matter candidate.
Citation
Brazilian Journal Of Physics. New York, v. 47, n. 4, p. 426-435, 2017.Sponsorship
CNPqFAPESP
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