Viable production mechanism of keV sterile neutrino with large mixing angle
Institute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary prospect 7a, Moscow 117312, Russia
2 Moscow Institute of Physics and Technology, Institutsky per. 9, Dolgoprudny 141700, Russia
a e-mail: email@example.com
Published online: 3 August 2018
We study a model with a hidden sector coupled to keV scale sterile neutrinos. Due to nontrivial dynamics of this sector, the initially massless sterile neutrino acquires a nonzero mass at some temperature corresponding to the phase transition in the hidden sector. It shifts the onset of oscillations in plasma to later times, so that the final abundance of sterile neutrinos is strongly suppressed. We argue that in this model various cosmological and astrophysical bounds can be significantly alleviated opening new perspectives for ground-based experiments such as Troitsk ν-mass and KATRIN in the large mixing region.
© The Authors, published by EDP Sciences 2018
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