Relativistic Khronon theory in agreement with modified Newtonian dynamics and large-scale cosmology

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00602191" target="_blank" >RIV/68378271:_____/24:00602191 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0362561" target="_blank" >https://hdl.handle.net/11104/0362561</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2024/11/040" target="_blank" >10.1088/1475-7516/2024/11/040</a>

Result language
angličtina
Original language name
Relativistic Khronon theory in agreement with modified Newtonian dynamics and large-scale cosmology
Original language description
We propose an extension of General Relativity (GR) based on a space-time foliation by three-dimensional space-like hypersurfaces labeled by the Khronon scalar field τ. We show that stems, (ii) recovers GR plus a cosmological constant in the strong field regime (iii) is inagreement with the standard cosmological model and the observed cosmic microwave backgroundanisotropies at linear cosmological scales, where the theory reduces to a subset of thegeneralized dark matter (GDM) model. We compute the second order action on a Minkowski backgroundand show that it contains the usual tensor modes of GR and a scalar degree of freedom withdispersion relation ω=0. We find that the deconstrained Hamiltonian is bounded from belowfor wavenumbers larger than ∼ 10^{-31}eV and unbounded for smaller wavenumbers.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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