49 citations · 196 across the 10 of their papers we have counts for
6 papers · 1 filter
Ward Identities in a Two-Dimensional Gravitational Model: Anomalous Amplitude Revisited Using a Completely Regularization-Independent Mathematical Strategy
G. Dallabona, P. G. de Oliveira, O. A. Battistel
We present a detailed investigation of the anomalous gravitational amplitude in a simple two-dimensional model with Weyl fermions. We employ a mathematical strategy that completely…
A predictive formulation of the Nambu--Jona-Lasinio model
O. A. Battistel, G. Dallabona, G. Krein
A novel strategy to handle divergences typical of perturbative calculations is implemented for the Nambu--Jona-Lasinio model and its phenomenological consequences investigated. The…
Anomalies Dismissed of Ambiguities and the Neutral Pion Decay
O. A. Battistel, G. Dallabona
The correlation between the neutral electromagnetic pion decay, the Sutherland-Veltman paradox and the triangle anomaly phenomenon is discussed within the framework of an alt…
Consistency in Perturbative Calculations and Radiatively Induced Lorentz and CPT Violations
O. A. Battistel, G. Dallabona
The origin of the radiatively induced Lorentz and CPT violations, in perturbative evaluations, of an extended version of QED, is investigated. Using a very general calculational me…
From arbitrariness to ambiguities in the evaluation of perturbative physical amplitudes and their symmetry relations
O. A. Battistel, G. Dallabona
A very general calculational strategy is applied to the evaluation of the divergent physical amplitudes which are typical of perturbative calculations. With this approach in the fi…
Role of Ambiguities and Gauge Invariance in the Calculation of the Radiatively Induced Chern-Simons Shift in Extended Q.E.D.
O. A. Battistel, G. Dallabona
We investigate the possibility of Lorentz and CPT violations in the photon sector, of the Chern-Simons form, be induced by radiative corrections arising from the Lorentz and CPT no…