ar X iv : h ep - p h / 03 09 08 4 v 2 1 1 M ay 2 00 5 2 PI effective action and gauge dependence identities

ar X iv : h ep - t h / 03 05 03 7 v 1 5 M ay 2 00 3 FORMS ON VECTOR BUNDLES OVER COMPACT REAL HYPERBOLIC MANIFOLDS

We study gauge theories based on abelian p− forms on real compact hyperbolic manifolds. The tensor kernel trace formula and the spectral functions associated with free generalized gauge fields are analyzed.

ar X iv : h ep - p h / 04 05 03 9 v 1 5 M ay 2 00 4 η , η ′ → π + π − γ with coupled channels

/ 03 09 08 4 v 1 8 S ep 2 00 3 2 PI effective action and gauge invariance problems

The problem of maintaining gauge invariance when truncating the two particle irreducible (2PI) effective action has been studied recently by several authors. Using a 2PI generalization of the Nielsen identities, we give a simple proof of the invariance of the effective action on-shell at leading order. We consider the case where the gauge is fixed by an arbitrary function of the quantum gauge f...

ar X iv : h ep - p h / 00 03 26 4 v 1 2 7 M ar 2 00 0 Time Dependence of Chemical Freeze - out in Relativistic Heavy Ion Collisions

ar X iv : h ep - p h / 04 05 03 5 v 1 5 M ay 2 00 4 Determination of the mass of the ΛΛ dibaryon by the method of QCD sum rules