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# Probing relic neutrino decays with 21 cm cosmology

Chianese, Marco, Di Bari, Pasquale, Farrag, Kareem, Ramadan Hassan Aly Muhammad and Samanta, Rome (2019) Probing relic neutrino decays with 21 cm cosmology. Physics Letters B, 790, 64-70.

Record type: Article

## Abstract

We show how 21 cm cosmology can test relic neutrino radiative decays into sterile neutrinos. Using recent EDGES results, we derive constraints on the lifetime of the decaying neutrinos. If the EDGES anomaly will be confirmed, then there are two solutions, one for much longer and one for much shorter lifetimes than the age of the universe, showing how relic neutrino radiative decays can explain the anomaly in a simple way. We also show how to combine EDGES results with those from radio background observations, showing that potentially the ARCADE 2 excess can be also reproduced together with the EDGES anomaly within the proposed non-standard cosmological scenario. Our calculation of the specific intensity at the redshifts probed by EDGES can be also applied to the case of decaying dark matter.

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1-s2.0-S037026931830741X-main - Version of Record

Submitted date: 2018
Accepted/In Press date: 19 September 2018
e-pub ahead of print date: 21 September 2018
Published date: 10 March 2019

## Identifiers

Local EPrints ID: 421527
URI: https://eprints.soton.ac.uk/id/eprint/421527
ISSN: 0370-2693
PURE UUID: 117218e8-fb7b-4b54-a8bf-3e9df12037c5

## Catalogue record

Date deposited: 14 Jun 2018 16:30

## Contributors

Author: Marco Chianese
Author: Rome Samanta
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