HEP Lattice·hep-lat
4 papers—3 primary·1 cross-listed·reconstructed*
Olmo Francesconi🇩🇰 · Marco Panero🇮🇹 · David Preti🇮🇹
We discuss the theoretical foundations of non-equilibrium Monte Carlo simulations based on Jarzynski's equality and present, as an example of application, the determination of the running coupling in the Schrödinger-functional scheme.
Heng-Tong Ding🇨🇳 · Olaf Kaczmarek🇩🇪 · Anna-Lena Lorenz🇩🇪 · Hiroshi Ohno🇯🇵 · Hauke Sandmeyer🇩🇪 · Hai-Tao Shu🇩🇪
We present continuum extrapolated results of charmonium and bottomonium correlators in the vector channel at several temperatures below and above . The continuum extrapolation jointly performed with the interpolations to have physical values of and masses in the confined phase is based on calculations on several large quenched isotropic lattices using clover-improved Wilson valence fermions carrying different quark masses. The extrapolated lattice correlators are confronted with perturbation theory results incorporating resummed thermal effects around the threshold from pNRQCD and vacuum asymptotics above the threshold. An additional transport peak is modelled below the threshold allowing for an estimate of the diffusion coefficients for charm and bottom quarks. We find that charmonium correlators in the vector channel can be well reproduced by perturbative spectral functions above where no resonance peaks for are needed at and above 1.1 , while for bottomonium correlators a resonance peak for is still needed up to 1.5 . By analyzing the transport contribution to the correlators we find that the drag coefficient of a charm quark is larger than that of a bottom quark.
In this contribution I discuss a recent proposal of a novel action for lattice gauge theory for finite systems, which accommodates non-periodic spatial boundary conditions. Drawing on the summation-by-parts formulation of finite differences and finite volume strategies of computational electrodynamics, an action is constructed that implements the proper integral form of Gauss' law and exhibits an inherently symmetric energy momentum tensor, all while realizing automatic improvement. Its central ingredients are illustrated using Abelian gauge theory as example.
Xin An🇺🇸 · Marcus Bluhm🇫🇷 · Lipei Du🇺🇸 · Gerald V. Dunne🇺🇸 · Hannah Elfner🇩🇪 · Charles Gale🇨🇦 · Joaquin Grefa🇺🇸 · Ulrich Heinz🇺🇸 · Anping Huang🇺🇸 · Jamie M. Karthein🇺🇸 · Dmitri E. Kharzeev🇺🇸 · Volker Koch🇺🇸 and 31 other authors
The Beam Energy Scan Theory (BEST) Collaboration was formed with the goal of providing a theoretical framework for analyzing data from the Beam Energy Scan (BES) program at the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory. The physics goal of the BES program is the search for a conjectured QCD critical point as well as for manifestations of the chiral magnetic effect. We describe progress that has been made over the previous five years. This includes studies of the equation of state and equilibrium susceptibilities, the development of suitable initial state models, progress in constructing a hydrodynamic framework that includes fluctuations and anomalous transport effects, as well as the development of freezeout prescriptions and hadronic transport models. Finally, we address the challenge of integrating these components into a complete analysis framework. This document describes the collective effort of the BEST Collaboration and its collaborators around the world.
* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.