Using non-DESI data to confirm and strengthen the DESI 2024 spatially flat cosmological parametrization result

CG Park, JC Pérez, B Ratra - Physical Review D, 2024 - APS
We use a combination of Planck cosmic microwave background (CMB) anisotropy data and
non-CMB data that include Pantheon+ type Ia supernovae (SNIa), Hubble parameter [H (z)] …

Exploring the Hubble tension with a late time Modified Gravity scenario

LA Escamilla, D Fiorucci, G Montani… - Physics of the Dark …, 2024 - Elsevier
We investigate a modified cosmological model aimed at addressing the Hubble tension,
considering revised dynamics in the late Universe. The model introduces a parameter c …

Massive neutrinos and cosmic composition

M Loverde, ZJ Weiner - Journal of Cosmology and Astroparticle …, 2024 - iopscience.iop.org
Cosmological data probe massive neutrinos via their effects on the geometry of the Universe
and the growth of structure, both of which are degenerate with the late-time expansion …

Cosmology with varying fundamental constants from hyperlight, coupled scalars

M Baryakhtar, O Simon, ZJ Weiner - Physical Review D, 2024 - APS
The fundamental constants at recombination can differ from their present-day values due to
degeneracies in cosmological parameters, raising the possibility of yet-undiscovered …

Is the CDM cosmological parameterization evidence for dark energy dynamics partially caused by the excess smoothing of Planck CMB anisotropy data?

CG Park, JC Perez, B Ratra - arxiv preprint arxiv:2410.13627, 2024 - arxiv.org
We study the performance of the spatially-flat dynamical dark energy (DE) $ w_0w_a $ CDM
parameterization, with redshift-dependent DE fluid equation of state parameter $ w (z) …

Hot new early dark energy bridging cosmic gaps: Supercooled phase transition reconciles stepped dark radiation solutions to the Hubble tension with BBN

M Garny, F Niedermann, H Rubira, MS Sloth - Physical Review D, 2024 - APS
We propose a simple model that can alleviate the H 0 tension while remaining consistent
with big bang nucleosynthesis (BBN). It is based on a dark sector described by a standard …

Diffuse neutrino background from magnetorotational stellar core collapses

P Martínez-Miravé, I Tamborra, MÁ Aloy… - Physical Review D, 2024 - APS
A statistically significant detection of the diffuse supernova neutrino background (DSNB) is
around the corner. To this purpose, we assess the contribution to the DSNB of …

Dynamical Dark Energy from Lattice Quantum Gravity

M Dai, W Freeman, J Laiho, M Schiffer… - arxiv preprint arxiv …, 2024 - arxiv.org
We study the behavior of the vacuum in Euclidean dynamical triangulations (EDT).
Algorithmic improvements and better lattice spacing determinations allow us to test the …

Deep Learning Based Recalibration of SDSS and DESI BAO Alleviates Hubble and Clustering Tensions

R Shah, P Mukherjee, S Saha, U Garain… - arxiv preprint arxiv …, 2024 - arxiv.org
Conventional calibration of Baryon Acoustic Oscillations (BAO) data relies on estimation of
the sound horizon at drag epoch $ r_d $ from early universe observations by assuming a …

Reconstructing the parameter space of nonanalytical cosmological fixed points

S García-Serna, JB Orjuela-Quintana… - … Journal of Modern …, 2023 - World Scientific
Dynamical system theory is a widely used technique in the analysis of cosmological models.
Within this framework, the equations describing the dynamics of a model are recast in terms …