QCD Hadron Spectroscopy with Staggered Dynamical Quarks at $\beta = 5.6$

TL;DR

This paper reports preliminary lattice QCD results on hadron spectroscopy using staggered dynamical quarks at a specific lattice setup, comparing staggered and Wilson valence quarks, and measuring various hadronic properties.

Contribution

It provides new lattice QCD spectroscopy data with both staggered and Wilson valence quarks at $eta=5.6$, including measurements of hadron masses, decay constants, and wave functions.

Findings

Measured hadron masses and decay constants for staggered and Wilson quarks.

Compared results between staggered and Wilson valence quarks.

Provided preliminary data for QCD hadron spectrum at specified parameters.

Abstract

We present preliminary results from the 1991 HEMCGC simulations with staggered dynamical fermions on a $16^3 \times 32$ lattice at $\beta = 5.6$ with sea quark masses $am_q = 0.025$ and 0.01. The spectroscopy was done both for staggered valence quarks with mass equal to the sea quark masses and for Wilson valence quarks at six different values for $\kappa$, 0.1320, 0.1410, 0.1525, 0.1565, 0.1585, and 0.1600. In addition to the measurements performed in our earlier work, we also measured the $\Delta$ and other `extended' hadrons for staggered valence quarks and pseudo-scalar decay constants and vector meson matrix elements, the wave function at the origin, for Wilson valence quarks.