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Lattice study of correlators of chromoelectric fields for heavy quarkonium dynamics in the quark-gluon plasma

Nora Brambilla1,2,3,*, Saumen Datta4,†, Marc Janer1,‡, Viljami Leino5,6,§, Julian Mayer-Steudte1,3,∥, Peter Petreczky7,¶, and Antonio Vairo1,** (TUMQCD Collaboration)

  • *Contact author: nora.brambilla@ph.tum.de
  • †Contact author: saumen@theory.tifr.res.in
  • ‡Contact author: m.janer@tum.de
  • §Contact author: viljami.leino@uni-mainz.de
  • ∥Contact author: julian.mayer-steudte@tum.de
  • Contact author: petreczk@bnl.gov
  • **Contact author: antonio.vairo@ph.tum.de

Phys. Rev. D 112, 074509 – Published 17 October, 2025

DOI: https://doi.org/10.1103/387k-mdl1

Abstract

We perform a lattice calculation of the correlators of two chromoelectric fields in the adjoint representation connected by adjoint Wilson lines at nonzero temperature. These correlators arise in the study of quarkonium dynamics and of adjoint heavy quark diffusion in deconfined matter. We work in SU(3) gauge theory using either gradient flow or multilevel algorithms for noise reduction, and discuss the renormalization of the correlators on the lattice. We find that a Casimir factor rescaling relates the adjoint correlators corresponding to the diffusion of an adjoint heavy quark and the octet-octet quarkonium transitions to the chromoelectric correlator in the fundamental representation describing the diffusion of a heavy quark.

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