Work

Understanding the spin-spin interactions among heavy quarks at finite temperature

Year: 2026

Type: conference-paper

Abstract: In this proceeding, we report the non-perturbative potential between a heavy quark–antiquark pair in a QCD plasma at finite temperature. We compute the spin-dependent component of the thermal potential using temporal Wilson line correlators with insertions of the color-magnetic field. The calculations are performed in quenched QCD at $1.5$ times the deconfinement temperature $T_d$, on a four-dimensional lattice with spatial extent $N_s = 68$, and temporal extents $N_\tau = 16$ and $20$. For the first time, we show that $V_{\text{ss}}(r)$ develops an imaginary part at finite temperature, a feature similar to that observed in the static potential. Finally, we discuss the physical implications of our results for understanding the dissociation of quarkonium bound states in the quark–gluon plasma.

Source: International Symposium on Lattice Field Theory (LATTICE)

DOI: 10.22323/1.518.0102

Authors: Swagatam Tah, Dibyendu Bala, Olaf Kaczmarek, Sayantan Sharma

Institutions: Homi Bhabha National Institute, Institute of Mathematical Sciences, Bielefeld University

Language: English

Topic: High-Energy Particle Collisions Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Deutsche Forschungsgemeinschaft, Universität Bielefeld

Awards: G166579837, TRR 211: Stark wechselwirkende Materie unter extremen Bedingungen