Separation of infrared and bulk in thermal QCD

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00603445" target="_blank" >RIV/61389005:_____/24:00603445 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP12(2024)101" target="_blank" >https://doi.org/10.1007/JHEP12(2024)101</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP12(2024)101" target="_blank" >10.1007/JHEP12(2024)101</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Separation of infrared and bulk in thermal QCD

Popis výsledku v původním jazyce

A new thermal regime of QCD, featuring decoupled scale-invariant infrared glue, has been proposed to exist both in pure-glue (Nf=0) and 'real-world' (Nf=2+1 at physical quark masses) QCD. In this IR phase, elementary degrees of freedom flood the infrared, forming a distinct component independent from the bulk. This behavior necessitates non-analyticities in the theory. In pure-glue QCD, such non-analyticities have been shown to arise via Anderson-like mobility edges in Dirac spectra (lambda IR = 0, +/-lambda A not equal 0), as manifested in the dimension function dIR(lambda). Here, we present the first evidence, based on lattice QCD calculation at a=0.105 fm, that this mechanism is also at work in real-world QCD, thus supporting the existence of the proposed IR regime in nature. An important aspect of our results is that, while at T = 234 MeV we find a dimensional jump between zero modes and lowest near-zero modes very close to unity (dIR = 3 to dIR similar or equal to 2), similar to the IR phase of pure-glue QCD, at T = 187 MeV we observe a continuous lambda-dependence. This suggests that thermal states just above the chiral crossover are non-analytically (in T) connected to thermal state at T = 234 MeV, supporting the key original proposition that the transition into the IR regime occurs at a temperature strictly above the chiral crossover.

Název v anglickém jazyce

Separation of infrared and bulk in thermal QCD

Popis výsledku anglicky

A new thermal regime of QCD, featuring decoupled scale-invariant infrared glue, has been proposed to exist both in pure-glue (Nf=0) and 'real-world' (Nf=2+1 at physical quark masses) QCD. In this IR phase, elementary degrees of freedom flood the infrared, forming a distinct component independent from the bulk. This behavior necessitates non-analyticities in the theory. In pure-glue QCD, such non-analyticities have been shown to arise via Anderson-like mobility edges in Dirac spectra (lambda IR = 0, +/-lambda A not equal 0), as manifested in the dimension function dIR(lambda). Here, we present the first evidence, based on lattice QCD calculation at a=0.105 fm, that this mechanism is also at work in real-world QCD, thus supporting the existence of the proposed IR regime in nature. An important aspect of our results is that, while at T = 234 MeV we find a dimensional jump between zero modes and lowest near-zero modes very close to unity (dIR = 3 to dIR similar or equal to 2), similar to the IR phase of pure-glue QCD, at T = 187 MeV we observe a continuous lambda-dependence. This suggests that thermal states just above the chiral crossover are non-analytically (in T) connected to thermal state at T = 234 MeV, supporting the key original proposition that the transition into the IR regime occurs at a temperature strictly above the chiral crossover.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10303 - Particles and field physics

Projekt

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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

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2024

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

21

Strana od-do

101

Kód UT WoS článku

001387138900001

EID výsledku v databázi Scopus

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