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arXiv · hep-lat/9902018

Comparative Study of full QCD Hadron Spectrum and Static Quark Potential with Improved Actions

CP-PACS-Collaboration·:·S. Aoki·G. Boyd·R. Burkhalter·S. Hashimoto·N. Ishizuka·Y. Iwasaki·K. Kanaya·T. Kaneko·Y. Kuramashi·M. Okawa·A. Ukawa·T. Yoshie
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Abstract

We investigate effects of action improvement on the light hadron spectrum and the static quark potential in two-flavor QCD for $a^{-1} \approx 1$ GeV and $m_{PS}/m_V = 0.7-0.9$. We compare a renormalization group improved action with the plaquette action for gluons, and the SW-clover action with the Wilson action for quarks. We find a significant improvement in the hadron spectrum by improving the quark action, while the gluon improvement is crucial for a rotationally invariant static potential. We also explore the region of light quark masses corresponding to $m_{PS}/m_V \geq 0.4$ on a 2.7 fm lattice using the improved gauge and quark action. A flattening of the potential is not observed up to 2 fm.

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CP-PACS-Collaboration, :, S. Aoki, G. Boyd, R. Burkhalter, S. Hashimoto, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneko, Y. Kuramashi, M. Okawa, A. Ukawa, T. Yoshie. 1999-02-12. Comparative Study of full QCD Hadron Spectrum and Static Quark Potential with Improved Actions. https://doi.org/10.1103/physrevd.60.114508

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