1202.1190 (Fedele Lizzi et al.)

Gauge and Poincare' Invariant Regularization and Hopf Symmetries    [PDF]

Fedele Lizzi, Patrizia Vitale

We consider the regularization of a gauge quantum field theory following a
modification of the Polchinski proof based on the introduction of a cutoff
function. We work with a Poincare' invariant deformation of the ordinary
point-wise product of fields introduced by Ardalan, Arfaei, Ghasemkhani and
Sadooghi, and show that it yields, through a limiting procedure of the cutoff
functions, to a regularized theory, preserving all symmetries at every stage.
The new gauge symmetry yields a new Hopf algebra with deformed co-structures,
which is inequivalent to the standard one.

View original: http://arxiv.org/abs/1202.1190