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arXiv · 0911.4869

Pure gauge glueballs at finite temperature

The CLQCD Collaboration·X. -F. Meng·G. Li·Y. Chen·C. Liu·Y. -B. Liu·J. -P. Ma·J. -B. Zhang
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Abstract

Pure gauge glueballs at finite temperature are investigated in a large temperature range from $0.3T_c$ to $1.9T_c$ on anisotropic lattices. Optimized glueball operators are used to obtain better signals. It is found in all 20 symmetry channels that the pole masses $M_G$ of glueballs remain almost constants when the temperature approaches the critical temperature $T_c$ from below, and start to reduce gradually with the temperature going above $T_c$. The glueball correlators in $0^{++}$, $0^{-+}$, and $2^{++}$ channels, are also analyzed based on the Breit-Wigner ansatz by assuming a thermal width $Γ$ to the pole mass $ω_0$. While $ω_0$'s are insensitive to $T$ in the whole temperature range, $Γ$'s exhibit distinct behavior below and above $T_c$: They are only few percents of $ω_0$ when $T T_c$ and reach values of roughly $Γ\sim ω_0/2$ at $T\approx 1.9T_c$.

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The CLQCD Collaboration, X. -F. Meng, G. Li, Y. Chen, C. Liu, Y. -B. Liu, J. -P. Ma, J. -B. Zhang. 2009-11-25. Pure gauge glueballs at finite temperature. https://arxiv.org/abs/0911.4869

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