Pure gauge glueballs at finite temperature

Details Pure gauge glueballs at finite temperature Pure gauge glueballs at finite temperature

2009-11-25

arxiv.org/abs/0911.4869v1

PoS LAT2009:187,2009

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2009, 8 pages, 5 figures

Scientific paper

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 $\Gamma$ to the pole mass $\omega_0$. While $\omega_0$'s are insensitive to $T$ in the whole temperature range, $\Gamma$'s exhibit distinct behavior below and above $T_c$: They are only few percents of $\omega_0$ when $TT_c$ and reach values of roughly $\Gamma\sim \omega_0/2$ at $T\approx 1.9T_c$.

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