Constraints on neutrino physics from DESI DR2 BAO and DR1 full shape

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00641313" target="_blank" >RIV/68378271:_____/25:00641313 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0376917" target="_blank" >https://hdl.handle.net/11104/0376917</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/w9pk-xsk7" target="_blank" >10.1103/w9pk-xsk7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Constraints on neutrino physics from DESI DR2 BAO and DR1 full shape

Popis výsledku v původním jazyce

The Dark Energy Spectroscopic Instrument (DESI) Collaboration has obtained robust measurements of baryon acoustic oscillations in the redshift range 0.1 < z <4.2, based on the Lyman-alpha forest and galaxies from data release 2. We combine these measurements with cosmic microwave background (CMB) data from Planck and the Atacama Cosmology Telescope to place our tightest constraints yet on the sum of neutrino masses. Assuming the cosmological ACDM model and three degenerate neutrino states, we find Sigma m(nu) <0.0642 eV (95%) with a marginalized error of sigma(Sigma m(nu)) = 0.020 eV. We also constrain the effective number of neutrino species, finding N-eff = 3.23 (+0.35)(-0.34) (95%), in line with the Standard Model prediction. When accounting for neutrino oscillation constraints, we find a preference for the normal mass ordering and an upper limit on the lightest neutrino mass of m(l) <0.023 eV (95%). However, we determine using frequentist and Bayesian methods that our constraints are in tension with the lower limits derived from neutrino oscillations.

Název v anglickém jazyce

Constraints on neutrino physics from DESI DR2 BAO and DR1 full shape

Popis výsledku anglicky

The Dark Energy Spectroscopic Instrument (DESI) Collaboration has obtained robust measurements of baryon acoustic oscillations in the redshift range 0.1 < z <4.2, based on the Lyman-alpha forest and galaxies from data release 2. We combine these measurements with cosmic microwave background (CMB) data from Planck and the Atacama Cosmology Telescope to place our tightest constraints yet on the sum of neutrino masses. Assuming the cosmological ACDM model and three degenerate neutrino states, we find Sigma m(nu) <0.0642 eV (95%) with a marginalized error of sigma(Sigma m(nu)) = 0.020 eV. We also constrain the effective number of neutrino species, finding N-eff = 3.23 (+0.35)(-0.34) (95%), in line with the Standard Model prediction. When accounting for neutrino oscillation constraints, we find a preference for the normal mass ordering and an upper limit on the lightest neutrino mass of m(l) <0.023 eV (95%). However, we determine using frequentist and Bayesian methods that our constraints are in tension with the lower limits derived from neutrino oscillations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Výzkum základních stavebních kamenů hmoty s využitím špičkových technologií</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

112

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

33

Strana od-do

083513

Kód UT WoS článku

001600962200002

EID výsledku v databázi Scopus

2-s2.0-105026355769