4 papers
Lorentz and CPT violations in QED : a short comment on recent controversies
Guy Bonneau
We rediscuss the recent controversy on a possible Chern-Simons like term generated through radiative corrections in QED with a CPT violating term. We emphasize the fact that any ab…
Non linear models : renormalisability versus geometry
Guy Bonneau
After some recalls on the standard (non)-linear model, we discuss the interest of B.R.S. symmetry in non-linear models renormalisation. We also emphasise the importance of…
On a possible breaking of global N=2 supersymmetry in non-linear $\si$ models on compact Kähler target spaces
Guy Bonneau
We analyse with the algebraic, regularisation independent, cohomological B.R.S. methods, the renormalisability of torsionless N=2 supersymmetric non-linear $\si$ models built on co…
B.R.S. renormalisation of some on-shell closed algebras of symmetry transformations : the example of supersymmetric non-linear sigma models : the N=1 case
Guy Bonneau
In order to study in a regularisation free manner the renormalisability of d=2 supersymmetric non-linear $\si$ models, one has to use the algebraic BRS methods ; moreover, in the a…