ar X iv : h ep - l at / 0 11 01 90 v 1 2 2 O ct 2 00 1 1 Topology and pion correlators – a study in the N f = 2 Schwinger model
نویسنده
چکیده
I readdress the issue whether the topological charge of the gauge background has an influence on a hadronic observable. To this end pion correlators in the Schwinger model with 2 dynamical flavours are determined on subensembles with a fixed topological charge. It turns out that the answer depends on a specific function of the sea-quark mass and the box volume which is in close analogy to the Leutwyler-Smilga parameter in full QCD.
منابع مشابه
ar X iv : h ep - l at / 9 71 00 19 v 1 3 O ct 1 99 7 Topological sectors and the pion mass
We study quenched and dynamical pion correlators in the two-flavour Schwinger model (2D QED) both within topological charge sectors and averaged. The results show that a clean-cut definition of a pion mass is no longer possible if tunneling between sectors does not occur.
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