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

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

Author Alves, Alexandre Autor UNIFESP Google Scholar
Dias, Alex Gomes Google Scholar
da Silva, Roberto Google Scholar
Abstract 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.
Keywords Maximum entropy principle
Axion-neutrino interaction
Dark matter
Language English
Sponsor CNPq
Grant number CNPq: 307098/2014-1
CNPq: 306636/2016-6
CNPq: 458498/2014-9
CNPq: 310017/2015-7
FAPESP: 2013/22079-8
Date 2017
Published in Brazilian Journal Of Physics. New York, v. 47, n. 4, p. 426-435, 2017.
ISSN 0103-9733 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 426-435
Access rights Closed access
Type Article
Web of Science ID WOS:000405687900008

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