TY  - JOUR
AU  - Huang, G. Y.
AU  - Lindner, M.
AU  - Martinez-Mirave, P.
AU  - Sen, M.
PY  - 2022
DA  - 2022//
TI  - Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 033004
EP  - 18pp
VL  - 106
IS  - 3
PB  - Amer Physical Soc
AB  - We investigate a consistent scenario of time-varying neutrino masses, and discuss its impact on cosmology, beta decay, and neutrino oscillation experiments. Such time-varying masses are assumed to be generated by the coupling between a sterile neutrino and an ultralight scalar field, which in turn affects the light neutrinos by mixing. We demonstrate how various cosmological bounds, such as those coming from big bang nucleosynthesis, the cosmic microwave background, as well as large scale structures, can be evaded in this model. This scenario can be further constrained using multiple terrestrial experiments. In particular, for beta-decay experiments like KATRIN, nontrivial distortions to the electron spectrum can be induced, even when time-variation is fast and it gets averaged. Furthermore, the presence of time-varying masses of sterile neutrinos will alter the interpretation of light sterile neutrino parameter space in the context of the reactor and gallium anomalies. In addition, we also study the impact of such time-varying neutrino masses on results from the BEST collaboration, which have recently strengthened the gallium anomaly. If confirmed, we find that the time-varying neutrino mass hypothesis could give a better fit to the recent BEST data.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2205.08431
UR  - https://doi.org/10.1103/PhysRevD.106.033004
DO  - 10.1103/PhysRevD.106.033004
LA  - English
N1  - WOS:000858614800005
ID  - Huang_etal2022
ER  -