TY  - JOUR
AU  - de Salas, P. F.
AU  - Gariazzo, S.
AU  - Laveder, M.
AU  - Pastor, S.
AU  - Pisanti, O.
AU  - Truong, N.
PY  - 2018
DA  - 2018//
TI  - Cosmological bounds on neutrino statistics
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 050
EP  - 18pp
VL  - 03
IS  - 3
PB  - Iop Publishing Ltd
KW  - cosmological neutrinos
KW  - neutrino properties
KW  - big bang nucleosynthesis
KW  - cosmological parameters from CMBR
AB  - We consider the phenomenological implications of the violation of the Pauli exclusion principle for neutrinos, focusing on cosmological observables such as the spectrum of Cosmic Microwave Background anisotropies, Baryon Acoustic Oscillations and the primordial abundances of light elements. Neutrinos that behave (at least partly) as bosonic particles have a modified equilibrium distribution function that implies a different influence on the evolution of the Universe that, in the case of massive neutrinos, can not be simply parametrized by a change in the effective number of neutrinos. Our results show that, despite the precision of the available cosmological data, only very weak bounds can be obtained on neutrino statistics, disfavouring a more bosonic behaviour at less than 2 sigma.
SN  - 1475-7516
UR  - http://arxiv.org/abs/1802.04639
UR  - https://doi.org/10.1088/1475-7516/2018/03/050
DO  - 10.1088/1475-7516/2018/03/050
LA  - English
N1  - WOS:000428984100005
ID  - deSalas_etal2018
ER  -