Dirac spectral density in Nf =2+1 QCD at T=230 MeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00601524" target="_blank" >RIV/61389005:_____/24:00601524 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.110.074515" target="_blank" >https://doi.org/10.1103/PhysRevD.110.074515</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.110.074515" target="_blank" >10.1103/PhysRevD.110.074515</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dirac spectral density in Nf =2+1 QCD at T=230 MeV

Popis výsledku v původním jazyce

We compute the renormalized Dirac spectral density in N-f = 2 + 1 QCD at physical quark masses, temperature T = 230 MeV, and system size L-s = 3.4 fm. To that end, we perform a pointwise continuum limit of the staggered density in lattice QCD with staggered quarks. We find, for the first time, that a clear infrared structure (IR peak) emerges in the density of the Dirac operator describing dynamical quarks. We also provide numerical evidence that a component of this peak, which becomes dominant in the thermodynamic limit, is due to a nontrivial accumulation of near-zero modes. Features of this structure are consistent with those previously attributed to the recently proposed IR phase of thermal QCD. Our results (i) provide the only complete first-principles evidence that these IR features exist and are physical, (ii) improve the upper bound for IR phase transition temperature T-IR so that the new window is 200 < T-IR <230 MeV, and (iii) are consistent with the nonrestoration of anomalous U-A(1) symmetry (chiral limit) below T = 230 MeV.

Název v anglickém jazyce

Dirac spectral density in Nf =2+1 QCD at T=230 MeV

Popis výsledku anglicky

We compute the renormalized Dirac spectral density in N-f = 2 + 1 QCD at physical quark masses, temperature T = 230 MeV, and system size L-s = 3.4 fm. To that end, we perform a pointwise continuum limit of the staggered density in lattice QCD with staggered quarks. We find, for the first time, that a clear infrared structure (IR peak) emerges in the density of the Dirac operator describing dynamical quarks. We also provide numerical evidence that a component of this peak, which becomes dominant in the thermodynamic limit, is due to a nontrivial accumulation of near-zero modes. Features of this structure are consistent with those previously attributed to the recently proposed IR phase of thermal QCD. Our results (i) provide the only complete first-principles evidence that these IR features exist and are physical, (ii) improve the upper bound for IR phase transition temperature T-IR so that the new window is 200 < T-IR <230 MeV, and (iii) are consistent with the nonrestoration of anomalous U-A(1) symmetry (chiral limit) below T = 230 MeV.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

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

110

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

074515

Kód UT WoS článku

001351028200001

EID výsledku v databázi Scopus

2-s2.0-85208017512