We measure chiral susceptibilities in the Coulomb phase of noncompact QED_4 in 8^4, 10^4 and 12^4 lattices. The MFA approach allows simulations in the chiral limit which are therefore free from arbitrary mass extrapolations. Using the critical couplings extracted from these calculations, we study the critical behaviour of the chiral condensate, which we find in disagreement with the predictions of logaritmically improved scalar Mean Field theory.

Chiral condensate, susceptibilities, critical coupling and indices in QED(4).

GALANTE, ANGELO;
1996

Abstract

We measure chiral susceptibilities in the Coulomb phase of noncompact QED_4 in 8^4, 10^4 and 12^4 lattices. The MFA approach allows simulations in the chiral limit which are therefore free from arbitrary mass extrapolations. Using the critical couplings extracted from these calculations, we study the critical behaviour of the chiral condensate, which we find in disagreement with the predictions of logaritmically improved scalar Mean Field theory.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11697/15513
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