6 papers
The effective gravitational action of a massless chiral fermion and the absence of parity-odd contributions
J. Anero, Carmelo P. Martin
We consider the field theory of a quantum massless left handed fermion coupled to a background graviton field, , on four-dimensional Minkowski spacetime. By using the BPH…
Generalized Kerr-Schild gauge
Enrique Alvarez, Jesus Anero
The Kerr-Schild gauge is generalized to the case that the vector generating the deformation is not null. Contrary to naive expectations, this vector generates a finite expansion fo…
On the Weyl anomaly for chiral fermions
Enrique Alvarez, Luis Alvarez-Gaume, Jesus Anero +1
We compute the parity-odd part of the Weyl anomaly for chiral fermions in a background gravitational field. We start from a manifestly real form of the Lagrangian (that is, not onl…
Some aspects of QFT in non-inertial frames
Enrique Ãlvarez, Jesús Anero
Some aspects of quantum field theory in a general (i.e. non inertial) frame of Minkowski spacetime are studied. Conditions for the presence of horizons as well as for the modificat…
One loop analysis of the cubic action for gravity
Enrique Alvarez, Jesus Anero, Carmelo P. Martin
We analyze some aspects of the cubic action for gravity recently proposed by Cheung and Remmen, which is a particular instance of a first order (Palatini) action. In this approach…
Witten diagrams in momentum space and one graviton exchange between scalars in Weyl invariant unimodular gravity
J. Anero, Carmelo P. Martin
We tackle head-on the computation of the -channel Witten diagram in momentum space corresponding to the exchange of a graviton between minimally coupled scalars in Weyl invarian…