102 citations · 150 across the 8 of their papers we have counts for
8 papers · 1 filter
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…
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…
Torsion Discovery Potential and Its Discrimination at CERN LHC
F. M. L. de Almeida, A. A. Nepomuceno, M. A. B. do Vale
Torsion models constitute a well known class of extended quantum gravity models. In this paper we study some phenomenological consequences of a torsion field interacting with fermi…
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…
Dirac and Majorana heavy neutrinos at LEP II
F. M. L. Almeida, Y. A. Coutinho, J. A. Martins Simões +2
The possibility of detecting single heavy Dirac and Majorana neutrinos at LEP II is investigated for heavy neutrino masses in the range . We study the pro…
Single neutral heavy lepton production at electron-muon colliders
F. M. L. Almeida, Y. A. Coutinho, J. A. Martins Simoes +1
New heavy Majorana and Dirac neutrinos production at future electron-muon colliders are investigated. The production of a single heavy neutrino is shown to be more relevant than pa…
Neutral heavy lepton production at next high energy linear colliders
F. M. L. Almeida, Y. A. Coutinho, J. A. Martins Simoes +1
The discovery potential for detecting new heavy Majorana and Dirac neutrinos at some recently proposed high energy colliders is discussed. These new particles are suggeste…
Signature for heavy Majorana neutrinos in hadronic collisions
F. M. L. Almeida, Y. A. Coutinho, J. A. Martins Simoes +1
The production and decay of new possible heavy Majorana neutrinos are analyzed in hadronic collisions. New bounds on the mixing of these particles with standard neutrinos are estim…