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GWStrings

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Gravitational Waves from Strings with Adaptive Mesh Refinement

Cosmic strings are motivated by simple extensions to the Standard Model of particle physics (BSM), including dark matter axion models (axion cosmology), superstring theory and grand unified theories. If present, cosmic strings wil... ver más

31/08/2027

UvA

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UNIVERSITEIT VAN AMSTERDAM No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

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Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto

HORIZON-MSCA-2023-PF-01-01: MSCA Postdoctoral Fellowships 2023 ExpectedOutcome:Project results are expected to contribute to the following outcomes:

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Duración del proyecto: 23 meses Fecha Inicio: 2025-09-01
Fecha Fin: 2027-08-31

Líder del proyecto

UNIVERSITEIT VAN AMSTERDAM No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Cosmic strings are motivated by simple extensions to the Standard Model of particle physics (BSM), including dark matter axion models (axion cosmology), superstring theory and grand unified theories. If present, cosmic strings will radiate gravitational waves (GWs) which could be detected by current and future GW experiments, such as LIGO-Virgo-KAGRA (LVK), LISA and the Einstein Telescope. Detection or bounds placed on cosmic strings provide deep insight into BSM particle physics models, and are a potential discovery channel for new fundamental fields.Searches for cosmic strings in LVK data have to date used analytic waveforms predicted using the Nambu-Goto (NG) approximation. This is problematic, as the NG model is known to be inaccurate in precisely the high-curvature regions from which the strongest GW signals are emitted. These waveforms have never been verified by numerical simulation, so current matched template searches may not provide useful information or constraints. GWStrings will address this by producing the first waveforms for cosmic string cusp configurations in full numerical relativity (NR) and using them to perform a matched template search in the LVK data. GWStrings will also match these waveforms to current analytic models to determine their validity. Simulations will be implemented using the adaptive mesh refinement (AMR) NR code, GRChombo.GWStrings will require crucial input from researchers in two key areas: theoretical understanding of fundamental fields in the strong gravity regime, and GW source modelling and data analysis. The first will be provided through a secondment at Sapienza University of Rome in the world-leading gravity theory group of Prof Paulo Pani. The second will be provided by GRAPPA, the host institute, whose foundational focus lies in connecting astroparticle physics, gravitational physics and cosmology, where the project supervisor Prof Samaya Nissanke, an internationally-recognised GW data analysis expert.

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