286 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of ConcepciónCL74 papers
- Pontificia Universidad Católica de ValparaísoCL33 papers
- Universidad Michoacana de San Nicolás de HidalgoMX20 papers
- Federico Santa María Technical UniversityCL19 papers
- Pontificia Universidad Católica de ChileCL15 papers
- Universidad Nacional Autónoma de MéxicoMX15 papers
- University of ChileCL15 papers
- University of La SerenaCL14 papers
- University of Cape TownZA13 papers
- Universidad de Santiago de ChileCL12 papers
- Universidad Católica de la Santísima ConcepciónCL10 papers
- University of ValparaísoCL10 papers
51 papers · 1 filter
General Four-Loop Beta Function for Scalar-Fermion Theories in Three Dimensions
York Schröder, Emmanuel Stamou, Tom Steudtner +1
We present general four-loop template -functions and anomalous field dimensions for renormalisable scalar-fermion theories in three dimensions. By imposing and $…
Non-Gaussian statistics of de Sitter spectators: A perturbative derivation of stochastic dynamics
Gonzalo A. Palma, Spyros Sypsas
Scalar fields interacting with the primordial curvature perturbation during inflation may communicate their statistics to the latter. This situation motivates the study of how the…
Perturbative S-matrix unitarity and higher-order Lorentz violation
Justo López-Sarrión, Carlos M. Reyes, César Riquelme
We investigate the preservation of unitarity in a Lorentz and CPT-violating QED model containing higher-order operators. In particular, we consider modifications in the fermion sec…
Tree-level unitarity, causality and higher-order Lorentz and CPT violation
Justo Lopez-Sarrion, Carlos M. Reyes, Cesar Riquelme
Higher-order effects of CPT and Lorentz violation within the SME effective framework including Myers-Pospelov dimension-five operator terms are studied. The model is canonically qu…
Logarithmic Corrections, Entanglement Entropy, and UV Cutoffs in de Sitter Spacetime
Gabriel Arenas-Henriquez, Felipe Diaz, Per Sundell
It has been argued that the entropy of de Sitter space corresponds to the entanglement between disconnected regions computable by switching on a replica parameter modeled by th…
Modified-gravity theories with nondynamical background fields
Carlos M. Reyes, Marco Schreck
We study the dynamics of a modified-gravity theory, which is supplemented by an extended Gibbons-Hawking-York boundary term and incorporates diffeomorphism violation through nondyn…
Metaplectic representation and ordering (in)dependence in Vasiliev's higher spin gravity
David De Filippi, Carlo Iazeolla, Per Sundell
We investigate the formulation of Vasiliev's four-dimensional higher-spin gravity in operator form, without making reference to one specific ordering. More precisely, we make use o…
Three-dimensional Maxwellian Carroll gravity theory and the cosmological constant
Patrick Concha, Diego Peñafiel, Lucrezia Ravera +1
In this work, we present the three-dimensional Maxwell Carroll gravity by considering the ultra-relativistic limit of the Maxwell Chern-Simons gravity theory defined in three space…
Hypersymmetric extensions of Maxwell Chern-Simons gravity in (2+1) dimensions
Ricardo Caroca, Patrick Concha, Javier Matulich +2
We present a consistent way of coupling three-dimensional Maxwell Chern-Simons gravity theory with massless spin- gauge fields. We first introduce the simplest hyper-M…
Three-dimensional exotic Newtonian supergravity theory with cosmological constant
Patrick Concha, Lucrezia Ravera, Evelyn Rodríguez
We present a supersymmetric extension of the exotic Newtonian Chern-Simons gravity theory in three spacetime dimensions. The underlying new non-relativistic superalgebra is obtaine…
Three-dimensional teleparallel Chern-Simons supergravity theory
Ricardo Caroca, Patrick Concha, Diego Peñafiel +1
In this work we present a gauge-invariant three-dimensional teleparallel supergravity theory using the Chern-Simons formalism. The present construction is based on a supersymmetric…
Optical theorem and indefinite metric in delta-theory
Ricardo Avila, Carlos M. Reyes
A class of effective field theory called delta-theory, which improves ultraviolet divergences in quantum field theory, is considered. We focus on a scalar model with a quartic self…
Chiral symmetry restoration in RQED at finite temperature in the supercritical coupling regime
Jean Báez, Alfredo Raya, J. C. Rojas
We explore the conditions for chiral symmetry breaking in reduced (or pseudo) quantum electrodynamics at finite temperature in connection with graphene and other 2D-materials with…
Unitarity in Maxwell-Carroll-Field-Jackiw electrodynamics
Manoel M. Ferreira, Jose A. Helayël-Neto, Carlos M. Reyes +2
In this work we focus on the Carroll-Field-Jackiw (CFJ) modified electrodynamics in combination with a CPT-even Lorentz-violating contribution. We add a photon mass term to the Lag…
Analytical solution to DGLAP integro-differential equation via complex maps in domains of contour integrals
Gustavo Alvarez, Igor Kondrashuk
A simple model for QCD dynamics in which the DGLAP integro-differential equation may be solved analytically has been considered in our previous papers arXiv:1611.08787 [hep-ph] and…
Causality, unitarity, and indefinite metric in Maxwell-Chern-Simons extensions
Ricardo Avila, Jose R. Nascimento, Albert Yu. Petrov +2
We canonically quantize -dimensional electrodynamics including a higher-derivative Chern-Simons term. The effective theory describes a standard photon and an additional degr…
On quantum aspects of the higher-derivative Lorentz-breaking extension of QED
T. Mariz, J. R. Nascimento, A. Yu. Petrov +1
We consider the higher-derivative Lorentz-breaking extension of QED, where the new terms are the Myers-Pospelov-like ones in gauge and spinor sectors, and the higher--derivative CF…
Perturbative unitarity and higher-order Lorentz symmetry breaking
Leonardo Balart, Carlos M. Reyes, Sebastian Ossandon +1
We study perturbative unitarity in the scalar sector of the Myers-Pospelov model. The model introduces a preferred four-vector which breaks Lorentz symmetry and couples to a fi…
Renormalization in a Lorentz-violating model and higher-order operators
J. R. Nascimento, A. Yu. Petrov, Carlos M. Reyes
The renormalization in a Lorentz-breaking scalar-spinor higher-derivative model involving self-interaction and the Yukawa-like coupling is studied. We explicitly de- monstrat…
Unitarity and Lee-Wick prescription at one loop level in the effective Myers-Pospelov electrodynamics: the annihilation
Carlos M. Reyes, L. F. Urrutia
We study perturbative unitarity in a Lorentz-symmetry-violating QED model with higher-order derivative operators in the light of the results of Lee and Wick to preserve unitarity i…
Application of the Feynman-tree theorem together with BCFW recursion relations
Markos Maniatis
Recently, it has been shown that on-shell scattering amplitudes can be constructed by the Feynman-tree theorem combined with the BCFW recursion relations. Since the BCFW relations…
Alternative method of Reduction of the Feynman Diagrams to a set of Master Integrals
Julio Borja, Igor Kondrashuk
We propose a new set of Master Integrals which can be used as a basis for certain multiloop calculations in massless gauge field theories. In these theories we consider three-point…
On the Lorentz-breaking theory with higher derivatives in spinor sector
J. R. Nascimento, A. Yu. Petrov, C. Marat Reyes
We consider the two-point function of the gauge field in Lorentz-breaking theories with higher-derivative extension of the Dirac Lagrangian. We show that the Carroll-Field-Jackiw t…
Polymer quantization, stability and higher-order time derivative terms
Patricio Cumsille, Carlos M. Reyes, Sebastian Ossandon +1
The stability of higher-order time derivative theories using the polymer extension of quantum mechanics is studied. First, we focus on the well-known Pais-Uhlenbeck model and by ca…