Bottomonia play a crucial role in our understanding of the quark gluon plasma. We present lattice non-relativistic QCD calculations of bottomonia at temperatures in the range T∈[47,380] MeV using the Fastsum Generation 2L anisotropic Nf=2+1 ensembles. The use of a basis of smeared operators allows the extraction of excited-state masses at zero temperature and an investigation of their thermal properties at non-zero temperature. We find that the ground state signal is substantially improved by this variational approach at finite temperature. We also apply the time-derivative moments approach to the projected or optimal correlation functions at finite temperature.
@article{arxiv.2502.03185,
title = {Anisotropic excited bottomonia from a basis of smeared operators},
author = {Ryan Bignell and Gert Aarts and Chris Allton and M. Naeem Anwar and Timothy J. Burns and Rachel Horohan D'arcy and Benjamin Jäger and Seyong Kim and Maria Paola Lombardo and Sinéad Ryan and Jon-Ivar Skullerud and Antonio Smecca},
journal= {arXiv preprint arXiv:2502.03185},
year = {2025}
}
Comments
13 pages, 3 figures, talk presented at the 41st International Symposium on Lattice Field Theory (Lattice2024), July 28th - August 3rd, 2024, Liverpool, UK