The University of Southampton
University of Southampton Institutional Repository

Cold dark matter from heavy right-handed neutrino mixing

Cold dark matter from heavy right-handed neutrino mixing
Cold dark matter from heavy right-handed neutrino mixing
We show that, within the see-saw mechanism, an almost decoupled RH neutrino species NDM with mass MDM >~ 100 GeV can play the role of Dark Matter (DM). The NDM's can be produced from non-adiabatic conversions of thermalized (source) RH neutrinos with mass MS lower than MDM. This is possible if a non-renormalizable operator is added to the minimal type I see-saw lagrangian. The observed DM abundance can be reproduced for MDM Δ1/4 ~ 10-13 Λeff ξ, where Λeff is a very high energy new physics scale, δ ≡ (MDM - MS)/MDM and ξ <~ 1 is a parameter determined by the RH neutrino couplings.
1550-7998
073017-[6pp]
Anisimov, Alexey
553bc69d-8d93-4ade-b51c-244d0c3c502b
Di Bari, Pasquale
3fe21e59-0eff-41bc-8faa-fdd817146418
Anisimov, Alexey
553bc69d-8d93-4ade-b51c-244d0c3c502b
Di Bari, Pasquale
3fe21e59-0eff-41bc-8faa-fdd817146418

Anisimov, Alexey and Di Bari, Pasquale (2009) Cold dark matter from heavy right-handed neutrino mixing. Physical Review D, 80 (73017), 073017-[6pp]. (doi:10.1103/PhysRevD.80.073017).

Record type: Article

Abstract

We show that, within the see-saw mechanism, an almost decoupled RH neutrino species NDM with mass MDM >~ 100 GeV can play the role of Dark Matter (DM). The NDM's can be produced from non-adiabatic conversions of thermalized (source) RH neutrinos with mass MS lower than MDM. This is possible if a non-renormalizable operator is added to the minimal type I see-saw lagrangian. The observed DM abundance can be reproduced for MDM Δ1/4 ~ 10-13 Λeff ξ, where Λeff is a very high energy new physics scale, δ ≡ (MDM - MS)/MDM and ξ <~ 1 is a parameter determined by the RH neutrino couplings.

Text
revjRHDM3.pdf - Accepted Manuscript
Download (189kB)

More information

Published date: 30 October 2009

Identifiers

Local EPrints ID: 154283
URI: https://eprints.soton.ac.uk/id/eprint/154283
ISSN: 1550-7998
PURE UUID: d8d4c648-74be-48a3-8f99-df3ce421871c

Catalogue record

Date deposited: 25 May 2010 08:25
Last modified: 30 Jul 2018 16:32

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×