Abstract
We study the topological susceptibility $\ensuremath{\chi}$ in QCD with two quark flavors using lattice field configurations that have been produced with an $O(a)$-improved clover quark action. We find clear evidence for the expected suppression at a small quark mass ${m}_{q}$ and examine the variation of $\ensuremath{\chi}$ with this mass and the lattice spacing a. A joint continuum and chiral extrapolation yields good agreement with theoretical expectations as ${a,m}_{q}\ensuremath{\rightarrow}0.$ A moderate increase in autocorrelation is observed on the more chiral ensembles, but within large statistical errors. Finite volume effects are negligible for the Leutwyler-Smilga parameter ${x}_{\mathrm{LS}}\ensuremath{\gtrsim}10,$ and no evidence for a nearby phase transition is observed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
