Year: 2024
Type: article
Abstract: A bstract A new thermal regime of QCD, featuring decoupled scale-invariant infrared glue, has been proposed to exist both in pure-glue (N f =0) and “real-world” (N f =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 ( λ IR = 0, ± λ A ≠ 0), as manifested in the dimension function d IR ( λ ). 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 ( d IR = 3 to d IR ≃ 2), similar to the IR phase of pure-glue QCD, at T = 187 MeV we observe a continuous λ -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.
Source: Journal of High Energy Physics
Institutions: Chinese Academy of Sciences, University of Chinese Academy of Sciences, George Washington University, University of Kentucky, Czech Academy of Sciences, Nuclear Physics Institute, Lawrence Berkeley National Laboratory, Centre National de la Recherche Scientifique, Université de Toulon, Aix-Marseille Université, Centre de Physique Théorique, International Centre for Theoretical Physics Asia-Pacific
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: National Science Foundation, U.S. Department of Energy, National Energy Research Scientific Computing Center, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, National Natural Science Foundation of China, Chinese Academy of Sciences, Shanghai Jiao Tong University, Office of Science, Oak Ridge Institute for Science and Education, Nuclear Physics, Oak Ridge National Laboratory
Awards: G1094733649, G121915436, G1554045874, G1645119126, G1728142190, G1988824864, G203625172, G2075189144, G2188849882, G222768804, G2263355576, G22747034, Hadronic contributions to the muon (g-2) from lattice QCD and searches for new physics beyond the Standard Model, G2386172424, G2399599801, G2411683797, G2702141073, G275679244, G2988778103, G3081063465, G328816031, INVESTIGATIONS OF THE STURCTURE AND ELECTROMAGNETIC INTERACTIONS OF FEW-BODY SYSTEMS, G3945850812, G4423657506, G4519729187, G4805327024, G4808970667, G4944917857, G5027663112, G5276189200, G5296751580, G614453801, G6403042655, G6410301491, G6427981414, G6674091005, G6702060814, G675320460, XSEDE: eXtreme Science and Engineering Discovery Environment, G7289327952, G7651947074, LATTICE QCD CALCULATION OF NUCLEON STRUCTURE, G8181039722, G8269158468, G8345268726, INVESTIGATIONS OF THE STURCTURE AND ELECTROMAGNETIC INTERACTIONS OF FEW-BODY SYSTEMS, 3D QUARK-GLUON STRUCTURE OF HADRONS: MASS, SPIN, AND TOMOGRAPHY, G8906985441, G89955983
OpenAlex ID: W4405972374