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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.

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Published date: 30 October 2009
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Identifiers

Local EPrints ID: 154283
URI: http://eprints.soton.ac.uk/id/eprint/154283
DOI: doi:10.1103/PhysRevD.80.073017
ISSN: 1550-7998
PURE UUID: d8d4c648-74be-48a3-8f99-df3ce421871c

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Date deposited: 25 May 2010 08:25
Last modified: 14 Mar 2024 01:34

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Author: Alexey Anisimov
Author: Pasquale Di Bari

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