Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2002-06-19
Phys.Rev. D66 (2002) 094506
Physics
High Energy Physics
High Energy Physics - Lattice
This is the revised version using more gauge configurations near T_c. 25 pages, Latex2e, 22 figures
Scientific paper
10.1103/PhysRevD.66.094506
The thermal properties of the glueballs are studied using SU(3) anisotropic lattice QCD with beta=6.25, the renormalized anisotropy xi=a_s/a_t=4 over the lattice of the size 20^3\times N_t with N_t = 24, 26, 28, 30, 33, 34, 35, 36, 37, 38, 40, 43, 45, 50, 72 at the quenched level. To construct a suitable operator on the lattice, we adopt the smearing method, and consider its physical meaning in terms of the operator size. First, we construct the temporal correlators G(t) for the 0^{++} and 2^{++} glueballs, using more than 5,000 gauge configurations at each temperature. We then measure the pole-mass of the thermal glueballs from G(t). For the lowest 0^{++} glueball, we observe a significant pole-mass reduction of about 300 MeV near T_c or m_G(T\simeq T_c) \simeq 0.8 m_G(T\sim 0), while its size remains almost unchanged as rho(T) \simeq 0.4fm. Finally, for completeness, as an attempt to take into account the effect of thermal width Gamma(T) at finite temperature, we perform a more general new analysis of G(t) based on its spectral representation. By adopting the Breit-Wigner form for the spectral function rho(omega), we perform the best-fit analysis as a straightforward extension to the standard pole-mass analysis. The result indicates a significant broadening of the peak as Gamma(T) \sim 300 MeV as well as rather modest reduction of the peak center of about 100 MeV near T_c for the lowest 0^{++} glueball. The temporal correlators of the color-singlet modes corresponding to these glueballs above T_c are also investigated.
Ishii Noriyoshi
Matsufuru Hideo
Suganuma Hideo
No associations
LandOfFree
Glueball Properties at Finite Temperature in SU(3) Anisotropic Lattice QCD does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Glueball Properties at Finite Temperature in SU(3) Anisotropic Lattice QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Glueball Properties at Finite Temperature in SU(3) Anisotropic Lattice QCD will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-458559