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Title: Quarkonium in-medium properties from realistic lattice NRQCD

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2]; ORCiD logo [3]
  1. Sejong Univ., Seoul (Korea)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. Heidelberg, Heidelberg (Germany); Univ. of Stavanger, Stavanger (Norway)

Here, we present the final results of our high statistics study on the properties of bottomonium and charmonium at finite temperature. We focus on the temperature range around the crossover transition 150 ≤ T ≤ 410MeV, relevant for current heavy ion collision experiments. The QCD medium degrees of freedom, which consist of dynamical u,d, and s quarks and gluons are captured by realistic state-of-the art (mπ ≈ 161MeV) lattice QCD simulations of the HotQCD collaboration. For the heavy quarks we deploy the non-relativistic effective field theory of QCD, NRQCD. The in-medium properties of quarkonium are deduced from their spectral functions, which are reconstructed using improved and novel Bayesian approaches. Through a systematic analysis we shed light on the origin of the discrepancies in melting temperatures previously reported in the literature, showing that they are owed to underestimated methods uncertainties of the deployed spectral reconstructions. Our simulations corroborate a picture of sequential in-medium modification, ordered according to the vacuum binding energy of the states. As a central quantitative result, our study reveals how the mass of the heavy quarkonium ground state reduces as temperature increases. The observed spectral modifications are interpreted in the light of, and compared to previous studies based on the complex lattice potential for heavy quarkonium. Furthermore for the first time we provide a robust picture of in-medium heavy quarkonium modification in the quark-gluon plasma consistent among different non-relativistic methods. We also critically discuss the perspectives for improving on these results.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
SC0012704
OSTI ID:
1487257
Report Number(s):
BNL--209753-2018-JAAM
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 11 Vol. 2018; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Transport coefficients from in-medium quarkonium dynamics journal September 2019
Thermal broadening of bottomonia: Lattice nonrelativistic QCD with extended operators journal October 2019
Quantum Brownian motion of a heavy quark pair in the quark-gluon plasma journal February 2020
Nonperturbative potential for the study of quarkonia in QGP journal February 2020
Quarkonium Production in the QGP journal May 2019
Quarkonium Production in the QGP text January 2019
Quantum Brownian motion of a heavy quark pair in the quark-gluon plasma text January 2019