Results 21 to 30 of about 507 (119)

Non-metricity signatures on the Higgs boson signal strengths at the LHC

Journal of High Energy Physics, 2022
In this work we study the high-energy Higgs boson phenomenology associated to the non-metricity scale Λ Q at the LHC. Non-metricity is present in more generic non-Riemannian geometries describing gravity beyond General Relativity and exhibits nice ...
Victor Ilisie
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Effective actions for loop quantum cosmology in fourth-order gravity

European Physical Journal C: Particles and Fields, 2021
Loop quantum cosmology (LQC) is a theory which renders the Big Bang initial singularity into a quantum bounce, by means of short-range repulsive quantum effects at the Planck scale.
Marcello Miranda, Daniele Vernieri, Salvatore Capozziello, Francisco S. N. Lobo   +3 more
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Generalized Rest Mass and Dirac’s Monopole in 5D Theory and Cosmology

Universe, 2021
It is shown that the 5D geodetic equations and 5D Ricci identities give us a way to create a new viewpoint on some problems of modern physics, astrophysics, and cosmology.
Boris G. Aliyev
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Shedding light on gravity: Black hole shadows and lensing signatures in Lorentz gauge theory

Nuclear Physics B
Recent advances, including gravitational wave detections and imaging of black hole shadows, have strongly validated general relativity. Nevertheless, ongoing cosmological observations suggest potential limitations of general relativity, spurring interest
Ali Övgün, Mohsen Fathi
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Cosmological perturbations in a class of fully covariant modified theories: application to models with the same background as standard LQC

European Physical Journal C: Particles and Fields, 2018
Bouncing cosmologies are obtained by adding to the Einstein–Hilbert action a term of the form $$\sqrt{-\,g}f(\chi )$$ -gf(χ) , with $$\chi $$ χ a scalar depending on the Hubble parameter only, not on its derivatives, and which is here shown to arise from
Jaume de Haro, Llibert Aresté Saló, Emilio Elizalde   +2 more
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A simple parity violating model in the symmetric teleparallel gravity and its cosmological perturbations

Physics Letters B, 2022
Parity violating models based on the symmetric teleparallel gravity have been considered in the literature, but their applications in cosmology and especially the features in cosmological perturbations have not been fully explored.
Mingzhe Li, Dehao Zhao
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Anomaly-induced effective action and Chern–Simons modification of general relativity

Physics Letters B, 2015
Recently it was shown that the quantum vacuum effects of massless chiral fermion field in curved space–time leads to the parity-violating Pontryagin density term, which appears in the trace anomaly with imaginary coefficient.
Sebastião Mauro, Ilya L. Shapiro
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Bekenstein’s Entropy Bound-Particle Horizon Approach to Avoid the Cosmological Singularity

Entropy, 2020
The cosmological singularity of infinite density, temperature, and spacetime curvature is the classical limit of Friedmann’s general relativity solutions extrapolated to the origin of the standard model of cosmology.
James R. Powell, Rafael Lopez-Mobilia, Richard A. Matzner   +2 more
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Probing time orientability of spacetime

European Physical Journal C: Particles and Fields, 2023
In general relativity, cosmology and quantum field theory, spacetime is assumed to be an orientable manifold endowed with a Lorentz metric that makes it spatially and temporally orientable.
N. A. Lemos, D. Müller, M. J. Rebouças
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Einstein, Planck and Vera Rubin: Relevant Encounters Between the Cosmological and the Quantum Worlds

Frontiers in Physics, 2021
In Cosmology and in Fundamental Physics there is a crucial question like: where the elusive substance that we call Dark Matter is hidden in the Universe and what is it made of?
Paolo Salucci, Giampiero Esposito, Gaetano Lambiase, Emmanuele Battista, Emmanuele Battista, Emmanuele Battista, Micol Benetti, Micol Benetti, Donato Bini, Donato Bini, Lumen Boco, Gauri Sharma, Valerio Bozza, Luca Buoninfante, Antonio Capolupo, Salvatore Capozziello, Salvatore Capozziello, Giovanni Covone, Giovanni Covone, Rocco D’Agostino, Rocco D’Agostino, Mariafelicia De Laurentis, Mariafelicia De Laurentis, Ivan De Martino, Ivan De Martino, Giulia De Somma, Giulia De Somma, Elisabetta Di Grezia, Chiara Di Paolo, Lorenzo Fatibene, Viviana Gammaldi, Andrea Geralico, Andrea Geralico, Lorenzo Ingoglia, Andrea Lapi, Giuseppe G. Luciano, Leonardo Mastrototaro, Adele Naddeo, Lara Pantoni, Luciano Petruzziello, Luciano Petruzziello, Ester Piedipalumbo, Ester Piedipalumbo, Silvia Pietroni, Aniello Quaranta, Paolo Rota, Giuseppe Sarracino, Francesco Sorge, Antonio Stabile, Cosimo Stornaiolo, Antonio Tedesco, Riccardo Valdarnini, Stefano Viaggiu, Stefano Viaggiu, Andy A. V. Yunge   +54 more
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