Impact of dynamical charm quarks

TL;DR

This paper investigates how the inclusion of dynamical charm quarks affects various low and high energy quantities in QCD, providing insights into their continuum limits.

Contribution

It offers a comparative analysis of QCD with and without dynamical charm quarks across multiple energy scales, highlighting their impact on physical observables.

Findings

Differences in hadronic scales $r_0$ and $t_0$ with and without charm quarks

Variations in charmonium masses due to dynamical charm quarks

Insights into the continuum limit behavior of QCD quantities

Abstract

We compute and compare the continuum limits of several quantities in QCD with and without a dynamical charm quark. We consider both low energy quantities, like the hadronic scales $r_0$ and $t_0$, and high energy quantities, like the charmonium masses.