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Gravitational echoes of lepton number symmetry breaking with light and ultralight Majorons

Addazi, Andrea ; Marcianò, Antonino ; Morais, António P. LU ; Pasechnik, Roman LU ; Viana, João and Yang, Hao (2023) In Journal of Cosmology and Astroparticle Physics 2023(9).
Abstract

We formulate a version of the low-scale Majoron model equipped with an inverse seesaw mechanism featuring lepton-number preserving dimension-6 operators in the scalar potential. Contrary to its dimension-4 counterpart, we find that the model can simultaneously provide light and ultralight Majorons, neutrino masses and their mixing, while featuring strong first-order cosmological phase transitions associated to the spontaneous breaking of the lepton number and the electroweak symmetries in the early Universe. We show by a detailed numerical analysis under which circumstances the model can be probed via the primordial gravitational wave spectrum potentially observable at LISA and other planned facilities. We discuss which implications... (More)

We formulate a version of the low-scale Majoron model equipped with an inverse seesaw mechanism featuring lepton-number preserving dimension-6 operators in the scalar potential. Contrary to its dimension-4 counterpart, we find that the model can simultaneously provide light and ultralight Majorons, neutrino masses and their mixing, while featuring strong first-order cosmological phase transitions associated to the spontaneous breaking of the lepton number and the electroweak symmetries in the early Universe. We show by a detailed numerical analysis under which circumstances the model can be probed via the primordial gravitational wave spectrum potentially observable at LISA and other planned facilities. We discuss which implications result for collider physics observables, such as scalar trilinear couplings, the scalar mixing angle and the mass of a new CP-even Higgs boson.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cosmological phase transitions, cosmology of theories beyond the SM, neutrino theory, particle physics - cosmology connection
in
Journal of Cosmology and Astroparticle Physics
volume
2023
issue
9
article number
026
publisher
IOP Publishing
external identifiers
  • scopus:85173173271
ISSN
1475-7516
DOI
10.1088/1475-7516/2023/09/026
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2023 The Author(s)
id
3d39bd1d-a843-41d2-ae3b-314199191547
date added to LUP
2023-11-10 13:59:40
date last changed
2023-12-01 13:23:34
@article{3d39bd1d-a843-41d2-ae3b-314199191547,
  abstract     = {{<p>We formulate a version of the low-scale Majoron model equipped with an inverse seesaw mechanism featuring lepton-number preserving dimension-6 operators in the scalar potential. Contrary to its dimension-4 counterpart, we find that the model can simultaneously provide light and ultralight Majorons, neutrino masses and their mixing, while featuring strong first-order cosmological phase transitions associated to the spontaneous breaking of the lepton number and the electroweak symmetries in the early Universe. We show by a detailed numerical analysis under which circumstances the model can be probed via the primordial gravitational wave spectrum potentially observable at LISA and other planned facilities. We discuss which implications result for collider physics observables, such as scalar trilinear couplings, the scalar mixing angle and the mass of a new CP-even Higgs boson.</p>}},
  author       = {{Addazi, Andrea and Marcianò, Antonino and Morais, António P. and Pasechnik, Roman and Viana, João and Yang, Hao}},
  issn         = {{1475-7516}},
  keywords     = {{cosmological phase transitions; cosmology of theories beyond the SM; neutrino theory; particle physics - cosmology connection}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{9}},
  publisher    = {{IOP Publishing}},
  series       = {{Journal of Cosmology and Astroparticle Physics}},
  title        = {{Gravitational echoes of lepton number symmetry breaking with light and ultralight Majorons}},
  url          = {{http://dx.doi.org/10.1088/1475-7516/2023/09/026}},
  doi          = {{10.1088/1475-7516/2023/09/026}},
  volume       = {{2023}},
  year         = {{2023}},
}