Cosmological Constraints on Neutrino Masses in a Second-Order CPL Dark Energy Model

Abstract

Recent DESI results indicate a strong preference for dynamical dark energy (DE) when baryon acoustic oscillation (BAO) measurements are combined with supernovae (SNe) and cosmic microwave background (CMB) data using the Chevallier-Polarski-Linder (CPL) parameterization. We analyze the exponential (EXP) parameterization, which introduces a second-order correction to CPL. We determine and compare the 95% upper bounds on the sum of neutrino masses for three dark energy (DE) models -- $\Lambda$CDM, CPL, and EXP -- across four neutrino mass hierarchies (1 massive/2 massless, degenerate, normal, inverted) and multiple dataset combinations (CMB$+$BAO, CMB$+$BAO$+$PantheonPlus, CMB$+$BAO$+$DESY5), employing both Bayesian and frequentist frameworks with physical lower limits from oscillation experiments (0.059 eV and 0.11 eV). Our results show that CPL yields tighter ($\lesssim 10$%) bounds compared to EXP. We further confirm earlier findings that neutrino mass constraints are only mildly sensitive to the assumed hierarchy and that the frequentist bounds are tighter than Bayesian ones. Furthermore, the imposed oscillation lower limits, the datasets used and the DE parameterizations play a crucial role in the inferred cosmological neutrino mass bounds. For the datasets, hierarchies, and DE parameterizations considered, we find no statistically significant evidence for nonzero neutrino mass consistent with oscillation lower limits.

arXiv comment21 pages, 11 figures. Published in Physics of the Dark Universe (Matches published version)

References in corpus (94)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Evidence for oscillation of atmospheric neutrinos
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• Stable clustering, the halo model and nonlinear cosmological power spectra
• The Pantheon+ Analysis: Cosmological Constraints
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Revising the Halofit Model for the Nonlinear Matter Power Spectrum
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• Massive neutrinos and cosmology
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• Small Scale Cosmological Perturbations: An Analytic Approach
• Conservative Constraints on Early Cosmology: an illustration of the Monte Python cosmological parameter inference code
• Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys
• 2020 Global reassessment of the neutrino oscillation picture
• Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• Probing dark energy using baryonic oscillations in the galaxy power spectrum as a cosmological ruler
• Weighing Neutrinos with Galaxy Surveys
• Unveiling $\nu$ secrets with cosmological data: neutrino masses and mass hierarchy
• New BBN limits on Physics Beyond the Standard Model from He4
• Signatures of Relativistic Neutrinos in CMB Anisotropy and Matter Clustering
• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
• Towards a precision calculation of $N_{\mathrm{eff}}$ in the Standard Model II: Neutrino decoupling in the presence of flavour oscillations and finite-temperature QED
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Neutrino decoupling including flavour oscillations and primordial nucleosynthesis
• A precision calculation of the effective number of cosmological neutrinos
• A precision calculation of relic neutrino decoupling
• Neutrino Physics from the Cosmic Microwave Background and Large Scale Structure
• The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and its Implications for Structure Growth
• Constraints on Cosmology from the Cosmic Microwave Background Power Spectrum of the 2500 ${\mathrm{deg}}^2$ SPT-SZ Survey
• GetDist: a Python package for analysing Monte Carlo samples
• Observational constraints on low redshift evolution of dark energy: How consistent are different observations?
• A parametric model for dark energy
• Primordial Nucleosynthesis: Successes And Challenges
• Constraints on the sum of the neutrino masses in dynamical dark energy models with $w(z)\ge -1$ are tighter than those obtained in $\Lambda$CDM
• CMB power spectra and cosmological parameters from Planck PR4 with CamSpec
• Nonequilibrium Corrections to the Spectra of Massless Neutrinos in the Early Universe
• Neutrino decoupling in the early Universe
• Cosmological parameters derived from the final (PR4) Planck data release
• Cosmological and Astrophysical Neutrino Mass Measurements
• Neutrino masses and the dark energy equation of state - relaxing the cosmological neutrino mass bound
• Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods
• The Damping Tail of CMB Anisotropies
• Effective number of neutrinos and baryon asymmetry from BBN and WMAP
• Robust Preference for Dynamical Dark Energy in DESI BAO and SN Measurements
• Neutrino mass in cosmology: status and prospects
• New constraint on Early Dark Energy from Planck and BOSS data using the profile likelihood
• Constraints on Interacting Dark Energy Models from the DESI Baryon Acoustic Oscillation and DES Supernovae Data
• Updated Bounds on Sum of Neutrino Masses in Various Cosmological Scenarios
• Updated Cosmological Constraints in Extended Parameter Space with Planck PR4, DESI Baryon Acoustic Oscillations, and Supernovae: Dynamical Dark Energy, Neutrino Masses, Lensing Anomaly, and the Hubble Tension
• Probing neutrino masses with future galaxy redshift surveys
• Current cosmological bounds on neutrino masses and relativistic relics
• Direct neutrino-mass measurement based on 259 days of KATRIN data
• Neutrino masses and their ordering: Global Data, Priors and Models
• Scale-dependent galaxy bias, CMB lensing-galaxy cross-correlation, and neutrino masses
• Cosmological mass limits on neutrinos, axions, and other light particles
• Using non-DESI data to confirm and strengthen the DESI 2024 spatially-flat $w_0{w}_a$CDM cosmological parameterization result
• Interpreting DESI 2024 BAO: late-time dynamical dark energy or a local effect?
• Physical effects involved in the measurements of neutrino masses with future cosmological data
• Non equilibrium spectra of degenerate relic neutrinos
• Neutrino cosmology after DESI: tightest mass upper limits, preference for the normal ordering, and tension with terrestrial observations
• Effects of neutrino mass hierarchies on dynamical dark energy models
• A fast test to assess the impact of marginalization in Monte Carlo analyses, and its application to cosmology
• Cosmology in Extended Parameter Space with DESI Data Release 2 Baryon Acoustic Oscillations: A 2$\sigma$+ Detection of Nonzero Neutrino Masses with an Update on Dynamical Dark Energy and Lensing Anomaly
• General Analytic Solutions of Scalar Field Cosmology with Arbitrary Potential
• Robustness of dark energy phenomenology across different parameterizations
• Massive neutrinos and cosmic composition
• Impacts of dark energy on weighing neutrinos after Planck 2015
• Model-agnostic assessment of dark energy after DESI DR1 BAO
• Cosmology and the neutrino mass ordering
• Strong Bayesian Evidence for the Normal Neutrino Hierarchy
• Model-independent cosmological inference post DESI DR1 BAO measurements
• Quintessence and phantoms in light of DESI 2025
• The DESI DR1/DR2 evidence for dynamical dark energy is biased by low-redshift supernovae
• Objective Bayesian analysis of neutrino masses and hierarchy
• Oscillation effects on neutrino decoupling in the early universe
• Weighing neutrinos in dynamical dark energy models
• Dynamical dark energy confronted with multiple CMB missions
• Imprints of an extended Chevallier-Polarski-Linder parametrization on the large scale of our universe
• Testing signatures of phantom crossing through full-shape galaxy clustering analysis
• Strong Bounds on Sum of Neutrino Masses in a 12 Parameter Extended Scenario with Non-Phantom Dynamical Dark Energy ($w(z)\ge -1$)
• Quantifying the tension between cosmological and terrestrial constraints on neutrino masses
• Cosmological constraints on dark energy models using DESI BAO 2024
• Profile Likelihoods in Cosmology: When, Why and How illustrated with $\Lambda$CDM, Massive Neutrinos and Dark Energy
• Accurately Weighing Neutrinos with Cosmological Surveys
• Revisiting the impact of neutrino mass hierarchies on neutrino mass constraints in light of recent DESI data
• Non-parametric reconstruction of cosmological observables using Gaussian Processes Regression
• Constraints on Dark Energy Models Using Late Universe Probes
• Exploring parametrized dark energy models in interacting scenario
• 2D BAO vs 3D BAO: Hints for new physics?

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