Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2004-09-06
Physics
High Energy Physics
High Energy Physics - Lattice
Lattice2004(topology), 3pages, 3figures
Scientific paper
10.1016/j.nuclphysbps.2004.11.32
We study the chiral condensates and the eta^prime meson correlators of the massive Schwinger model in non-zero theta vacuum. Our data suggest that the pseudoscalar operator does condense in a fixed topological sector and gives long range correlations of the eta^prime meson. We find that this is well understood from the clustering decomposition and statistical picture. Our result also indicates that even in theta=0 case, the long range correlation of eta^prime meson receives non-zero contributions from all the topological sectors and that their cancellation is non-trivial and requires accurate measurement of the reweighting factors as well as the expectation values. It is then clear that the fluctuation of the disconnected diagram originates from the pseudoscalar condensates.
Fukaya Hidenori
Onogi Tetsuya
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