97 citations · 343 across the 12 of their papers we have counts for
12 papers
Warm dark energy
Gianguido Dall'Agata, Sergio Gonzalez-Martin, Alexandros Papageorgiou +1
Motivated by some of the recent swampland conjectures, we study the implementation for the late time acceleration of the Universe of a mechanism developed by Anber and Sorbo in the…
Scattering of fermions in the Yukawa theory coupled to Unimodular Gravity
Sergio Gonzalez-Martin, Carmelo P. Martin
We compute the lowest order gravitational UV divergent radiative corrections to the S matrix element of the scattering process in t…
Physical content of Quadratic Gravity
Enrique Alvarez, Jesus Anero, Sergio Gonzalez-Martin +1
We have recently undergone an analysis of gravitational theories as defined in first order formalism, where the metric and the connection are treated as independent fields. The phy…
A candidate for an UV completion: quadratic gravity in first order formalism
Enrique Alvarez, Jesus Anero, Sergio Gonzalez-Martin +1
We consider the most general action for gravity which is quadratic in curvature. In this case first order and second order formalisms are not equivalent. This framework is a good c…
Ghost-free higher derivative unimodular gravity
Enrique Alvarez, Sergio Gonzalez-Martin
The unimodular version of the ghost-free higher derivative gravity is obtained. It is the unimodular reduction of some particular lagrangians quadratic in curvature.
Do the gravitational corrections to the beta functions of the quartic and Yukawa couplings have an intrinsic physical meaning?
S. Gonzalez-Martin, C. P. Martin
We study the beta functions of the quartic and Yukawa couplings of General Relativity and Unimodular Gravity coupled to the and Yukawa theories with masses. We show that the…
Asymptotic solutions in asymptotic safety
Sergio Gonzalez-Martin, Tim R. Morris, Zoë H. Slade
We explain how to find the asymptotic form of fixed point solutions in functional truncations, in particular approximations. We find that quantum fluctuations do not decoupl…
Quadratic gravity in first order formalism
Enrique Alvarez, Jesus Anero, Sergio Gonzalez-Martin
We consider the most general action for gravity which is quadratic in curvature. In this case first order and second order formalisms are not equivalent. This framework is a good c…
Weyl Gravity Revisited
Enrique Alvarez, Sergio Gonzalez-Martin
The on shell equivalence of first order and second order formalisms for the Einstein-Hilbert action does not hold for those actions quadratic in curvature. It would seem that by co…
Unimodular Trees versus Einstein Trees
Enrique Alvarez, Sergio Gonzalez-Martin, Carmelo P. Martin
The maximally helicity violating (MHV) tree level scattering amplitudes involving three, four or five gravitons are worked out in Unimodular Gravity. They are found to coincide wit…
Quantum Corrections to Unimodular Gravity
Enrique Álvarez, Sergio González-Martín, Mario Herrero-Valea +1
The problem of the cosmological constant appears in a new light in Unimodular Gravity. In particular, the zero momentum piece of the potential (that is, the constant piece independ…
Some Cosmological Consequences of Weyl Invariance
Enrique Álvarez, Sergio González-Martin, Mario Herrero-Valea
We examine some Weyl invariant cosmological models in the framework of generalized dilaton gravity, in which the action is made of a set of conformally coupled scalar fields. I…