Possible evidence for the mass shift of η’ meson at finite temperature
نویسنده
چکیده
Topological charge distributions of SU(3) gauge theory at finite temperature are calculated on the lattice with high statistics in a manner of free from the uncertainty of β-function. Clear temperature dependence of the topological charge distribution is obtained. Combining the present result with the recent study about the relation between the masses of η meson system and the gauge field topology, we obtain mη′(T )/mη′(0) = 0.86±0.02 and 0.69±0.01 for T = 0.75Tc and T = 0.93Tc, respectively. The result shows the first clear evidence of the mass shift of η meson at finite temperature.
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