Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets

We present a model-independent search for a gravitational wave background from cosmic domain walls (DWs) in the NANOGrav 12.5 years dataset and International PTA Data Release 2. DWs that annihilate at temperatures ∼ 20–50 MeV with tensions ∼ (40–100 TeV)$^{3}$ provide as good a fit to both datase...

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Detalles Bibliográficos
Autores principales: Ferreira, Ricardo Z., Notari, Alessio, Pujolas, Oriol, Rompineve, Fabrizio
Lenguaje:eng
Publicado: 2022
Materias:
Particle Physics - Phenomenology
General Relativity and Cosmology
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2023/02/001
http://cds.cern.ch/record/2807793
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author Ferreira, Ricardo Z.
Notari, Alessio
Pujolas, Oriol
Rompineve, Fabrizio
author_facet Ferreira, Ricardo Z.
Notari, Alessio
Pujolas, Oriol
Rompineve, Fabrizio
author_sort Ferreira, Ricardo Z.
collection CERN
description We present a model-independent search for a gravitational wave background from cosmic domain walls (DWs) in the NANOGrav 12.5 years dataset and International PTA Data Release 2. DWs that annihilate at temperatures ∼ 20–50 MeV with tensions ∼ (40–100 TeV)$^{3}$ provide as good a fit to both datasets as the astrophysical background from supermassive black hole mergers. DWs may decay into the Standard Model (SM) or a dark sector. In the latter case we predict an abundance Δ N $_{eff}$ of dark radiation well within the reach of upcoming CMB surveys. Complementary signatures at colliders and laboratories can arise if couplings to the SM are present. As an example, we discuss heavy axion scenarios, where DW annihilation may interestingly be induced by QCD confinement.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
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spelling cern-28077932023-10-21T02:31:44Zdoi:10.1088/1475-7516/2023/02/001http://cds.cern.ch/record/2807793engFerreira, Ricardo Z.Notari, AlessioPujolas, OriolRompineve, FabrizioGravitational Waves from Domain Walls in Pulsar Timing Array DatasetsParticle Physics - PhenomenologyGeneral Relativity and CosmologyAstrophysics and AstronomyWe present a model-independent search for a gravitational wave background from cosmic domain walls (DWs) in the NANOGrav 12.5 years dataset and International PTA Data Release 2. DWs that annihilate at temperatures ∼ 20–50 MeV with tensions ∼ (40–100 TeV)$^{3}$ provide as good a fit to both datasets as the astrophysical background from supermassive black hole mergers. DWs may decay into the Standard Model (SM) or a dark sector. In the latter case we predict an abundance Δ N $_{eff}$ of dark radiation well within the reach of upcoming CMB surveys. Complementary signatures at colliders and laboratories can arise if couplings to the SM are present. As an example, we discuss heavy axion scenarios, where DW annihilation may interestingly be induced by QCD confinement.We present a model-independent search for the gravitational wave background from cosmic domain walls (DWs) in the NANOGrav 12.5 years dataset and International PTA Data Release 2. DWs that annihilate at temperatures $\sim 20-50~\text{MeV}$ with tensions $\sim (40-100~\text{TeV})^3$ provide as good a fit to both datasets as the astrophysical background from supermassive black hole mergers. DWs may decay into the Standard Model (SM) or a dark sector. In the latter case we predict an abundance $\Delta N_{\text{eff}}$ of dark radiation well within the reach of upcoming CMB surveys. Complementary signatures at colliders and laboratories can arise if couplings to the SM are present. As an example, we discuss heavy axion scenarios, where DW annihilation may interestingly be induced by QCD confinement.arXiv:2204.04228CERN-TH-2022-214oai:cds.cern.ch:28077932022-04-08
spellingShingle Particle Physics - Phenomenology
General Relativity and Cosmology
Astrophysics and Astronomy
Ferreira, Ricardo Z.
Notari, Alessio
Pujolas, Oriol
Rompineve, Fabrizio
Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
title Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
title_full Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
title_fullStr Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
title_full_unstemmed Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
title_short Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
title_sort gravitational waves from domain walls in pulsar timing array datasets
topic Particle Physics - Phenomenology
General Relativity and Cosmology
Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2023/02/001
http://cds.cern.ch/record/2807793
work_keys_str_mv AT ferreiraricardoz gravitationalwavesfromdomainwallsinpulsartimingarraydatasets
AT notarialessio gravitationalwavesfromdomainwallsinpulsartimingarraydatasets
AT pujolasoriol gravitationalwavesfromdomainwallsinpulsartimingarraydatasets
AT rompinevefabrizio gravitationalwavesfromdomainwallsinpulsartimingarraydatasets

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