10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade de São PauloBR795 papers
- Universidade Federal do Rio de JaneiroBR793 papers
- Boston UniversityUS774 papers
- Brookhaven National LaboratoryUS774 papers
- Ludwig-Maximilians-Universität MünchenDE774 papers
- Queen Mary University of LondonGB774 papers
- The University of Texas at ArlingtonUS774 papers
- University of GenevaCH774 papers
- University of OklahomaUS774 papers
- University of OxfordGB774 papers
- University of Science and Technology of ChinaCN774 papers
- AGH University of KrakowPL773 papers
23 papers · 1 filter
On a chi^2-function with previously estimated background
Fernando M. L. Almeida, Andre A. Nepomuceno
There are intensive efforts searching for new phenomena in many present and future scientific experiments such as LHC at CERN, CLIC, ILC and many others. These new signals are usua…
Torsion Limits From Production at the LHC
Fernando Marroquim, Fernando de Andrade, Maria A. B. do Vale +1
Torsion models constitute a well known class of extended quantum gravity models. In this work, one investigates the phenomenological consequences of a torsion field interacting wit…
Evidence of sub-nucleonic degrees of freedom in J/ photoproduction in ultraperipheral collisions at the CERN Large Hadron Collider
E. Andrade-II, I. González, A. Deppman +1
We present calculations for the incoherent photoproduction of J/ vector mesons in ultra-peripheral heavy ion collisions (UPC) in terms of hadronic interactions. This study was c…
The Importance of Asymptotic Freedom for the Pseudocritical Temperature in Magnetized Quark Matter
R. L. S. Farias, K. P. Gomes, G. I. Krein +1
Although asymptotic freedom is an essential feature of QCD, it is absent in effective chiral quark models like the Nambu--Jona-Lasinio and linear sigma models. In this work we advo…
Reliability of the Optimized Perturbation Theory for scalar fields at finite temperature
R. L. S. Farias, D. L. Teixeira, R. O. Ramos
The thermodynamics of a massless scalar field with a quartic interaction is studied up to third order in the Optimized Perturbation Theory (OPT) method. A comparison with other non…
Non-perturbative description of self-interacting charged scalar field at finite temperature and in the presence of an external magnetic field
D. C. Duarte, R. L. S. Farias, R. O. Ramos
It is studied the symmetry restoration in a theory of a self-interacting charged scalar field at finite temperature and in the presence of an external magnetic field. The effective…
Optimized perturbation theory for charged scalar fields at finite temperature and in an external magnetic field
D. C. Duarte, R. L. S. Farias, Rudnei O. Ramos
Symmetry restoration in a theory of a self-interacting charged scalar field at finite temperature and in the presence of an external magnetic field is examined. The effective poten…
Double seesaw mechanism in a left-right symmetric model with TeV neutrinos
F. M. L. de Almeida, Y. A. Coutinho, J. A. Martins Simões +4
A left-right symmetric model is discussed with new mirror fermions and a Higgs sector with two doublets and neutral scalar singlets. The seesaw mechanism is generalized, including…
Langevin Simulation of Scalar Fields: Additive and Multiplicative Noises and Lattice Renormalization
N. C. Cassol-Seewald, R. L. S. Farias, E. S. Fraga +2
We consider the Langevin lattice dynamics for a spontaneously broken lambda phi^4 scalar field theory where both additive and multiplicative noise terms are incorporated. The latti…
Discriminating among the theoretical origins of new heavy Majorana neutrinos at the CERN LHC
F. M. L. de Almeida, Y. A. Coutinho, J. A. Martins Simoes +3
A study on the possibility of distinguishing new heavy Majorana neutrino models at LHC energies is presented. The experimental confirmation of standard neutrinos with non-zero mass…
Torsion Phenomenology at the LHC
A. S. Belyaev, I. L. Shapiro, M. A. B. do Vale
We explore the potential of the CERN Large Hadron Collider (LHC) to test the dynamical torsion parameters. The form of the torsion action can be established from the requirements o…
Relativistic NJL Model with Light and Heavy Quarks
A. L. Mota, E. Ruiz Arriola
We study the Nambu-Jona-Lasinio model with light and heavy quarks in a relativistic approach. We emphasize relevant regularization issues as well as the transition from light to he…
On signatures for the Littlest Higgs model in electron-positron colliders
F. M. L. de Almeida, Y. A. Coutinho, J. A. Martins Simões +3
There is a recent proposal of identifying the Higgs particle of the Standard Model as a pseudo Nambu-Goldstone boson. This new broken symmetry introduces new particles and new inte…
Symmetries and Ambiguities in the linear sigma model with light quarks
E. W. Dias, Brigitte Hiller, A. L. Mota +3
We investigate the role of undetermined finite contributions generated by radiative corrections in a linear sigma model with quarks. Although some of such terms…
The Role of hidden ambiguities in the Linear Sigma Model with fermions
Brigitte Hiller, A. L. Mota, M. C. Nemes +2
The Linear Sigma Model (LSM) with quark degrees of freedom is used to show that radiative corrections generate undetermined finite contributions. Their origin…
Phase Transition in Asymmetrical Superfluids I: Equal Fermi Surfaces
Heron Caldas, C. W. Morais, A. L. Mota
In this paper, we study phase transitions in asymmetrical fermion superfluids. In this scenario, the candidates to form pair are particles with mismatched masses and chemical poten…
On a signature at next high energy electron-positron colliders
F. M. L Almeida, Y. A. Coutinho, J. A. Martins Simões +3
The associated production of a and a final hard photon in high energy electron-positron colliders is studied. It is shown that the hard photon spectrum contains useful…
Infrared Behavior of the Pressure in Theory Reexamined
Heron Caldas, A. L. Mota
We reinvestigate the infrared behavior of the pressure in the scalar theory in six dimensions. This problem was first studied by Almeida and Frenkel and more recently by Ca…
Minimal left-right symmetric models and new properties at future electron-positron colliders
F. M. L. Almeida, Y. A. Coutinho, J. A. Martins Simões +4
It was recently shown that left-right symmetric models for elementary particles can be built with only two Higgs doublets. The general consequence of these models is that the left…
Neutral Pion Decay Width in a Hot and Dense Medium
Heron Caldas
We study the behavior of the width as a function of temperature and density. We provide simple expressions for the neutral pion width in a hot and dense medium based on a ren…
New heavy charged leptons at future high energy electron-positron colliders
F. M. L. Almeida, Y. A. Coutinho, J. A. Martins Simoes +2
New heavy charged lepton production and decay signatures at future electron-positron colliders are investigated at GeV. The consequences of model dependence for vec…
Analytic Properties of Thermal Corrected Boson Propagators
H. C. de Godoy Caldas, M. Hott
We investigate the analytic properties of finite-temperature self-energies of bosons interacting with fermions at one-loop order. A simple boson-fermion model was chosen due to its…
Symmetry Nonrestoration in a Resummed Renormalized Theory at High Temperature
H. C. de Godoy Caldas
We reinvestigate the interesting phenomenon of symmetry nonrestoration at high temperature in the multifield O(N_1) X O(N_2) model. We apply modified self-consistent resummation (M…