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DOE OSTI Β· 2572805

Spatial String Tension and Its Effects on Screening Correlators in a Thermal QCD Plasma

Bala, Dibyendu [University of Bielefeld (Germany)] (ORCID:000000032677383X)Β·Kaczmarek, Olaf [University of Bielefeld (Germany)] (ORCID:0000000269862341)Β·Petreczky, Peter [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000302852066)Β·Sharma, Sayantan [Homi Bhabha National Inst. (India)] (ORCID:0000000157754805)Β·Tah, Swagatam [Homi Bhabha National Inst. (India)] (ORCID:0000000309665263)
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Abstract

We calculate the spatial Wilson line correlator for 2 +1 flavor QCD using highly improved staggered quark discretization for fermions and in quenched QCD for a wide range of temperatures, from the chiral crossover temperature 𝑇 pc ≃ 156 MeV or the deconfinement temperature ≃300 MeV, respectively, up to 2 GeV. Extracting the spatial string tension for different lattice cutoffs and by performing a continuum extrapolation of this observable, we show that the soft (magnetic) gluons interact nonperturbatively even at temperatures ≳1 GeV. We provide incriminating evidences to demonstrate that dimensionally reduced effective theories can describe these soft quark and gluon quasi-particles for both quenched and 2 +1 flavor QCD, at temperatures 𝑇 ≳ 5⁒𝑇 pc . We also show for the first time the imprints of the nonperturbative pseudopotential in the properties of mesonic screening masses for temperatures ranging from 0.8 to 164 GeV in the quark-gluon plasma.

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDScolor confinementeffective field theorylattice QCDnonrelativistic QCDquantum chromodynamicsquark-gluon plasma

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Bala, Dibyendu [University of Bielefeld (Germany)] (ORCID:000000032677383X), Kaczmarek, Olaf [University of Bielefeld (Germany)] (ORCID:0000000269862341), Petreczky, Peter [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000302852066), Sharma, Sayantan [Homi Bhabha National Inst. (India)] (ORCID:0000000157754805), Tah, Swagatam [Homi Bhabha National Inst. (India)] (ORCID:0000000309665263). 2025-06-30. Spatial String Tension and Its Effects on Screening Correlators in a Thermal QCD Plasma. https://doi.org/10.1103/3tmf-s94w

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