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  1. No Access

    Article

    Analysis of EBSD Grain Size Measurements Using Microstructure Simulations and a Customizable Pattern Matching Library for Grain Perimeter Estimation

    Grain size data from electron backscatter diffraction (EBSD) maps are often reported as the mean of the circle equivalent diameters of the measured grain areas. Circle equivalent diameters are not directly com...

    Y. A. Coutinho, S. C. K. Rooney, E. J. Payton in Metallurgical and Materials Transactions A (2017)

  2. No Access

    Article

    Extra neutral gauge boson from two versions of the 3-3-1 model in future linear colliders

    Our aim is to establish some signatures of the extra gauge boson Z′, predicted in two versions of the SU(3)C×SU(3)L×U(1)X model and to show possible differences between these signatures. First, by considering the...

    E. Ramirez-Barreto, Y.A. Coutinho, J. Sá Borges in The European Physical Journal C (2007)

  3. No Access

    Article

    On a \(Z^{\prime}\) signature at next high energy electron-positron colliders

    The associated production of a \(Z^{\prime}\) and a final hard photon in high energy electron-positron colliders is stu...

    F. M. L. Almeida Jr., Y. A. Coutinho… in The European Physical Journal C - Particle… (2005)

  4. No Access

    Article

    Minimal left-right symmetric models and new Z’ properties at future electron-positron colliders

    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 and right fermionic sectors c...

    F. M. L. Almeida Jr., Y. A. Coutinho… in The European Physical Journal C - Particle… (2004)

  5. No Access

    Article

    New heavy charged leptons at future high energy electron-positron colliders

    New heavy charged lepton production and decay signatures at future electron-positron colliders are investigated at \(\sqrt {s}=500\) GeV. The consequences of model dependence for...

    F. M. L. Almeida Jr., Y. A. Coutinho… in The European Physical Journal C - Particle… (2003)

  6. No Access

    Article

    Dirac and Majorana heavy neutrinos at LEP II

    The possibility of detecting single heavy Dirac and/or Majorana neutrinos at LEP II is investigated for heavy neutrino masses in the range \(M_N=(s^{1/2}/2,s^{1/2})\) . We study ...

    F.M.L. Almeida Jr., Y.A. Coutinho… in The European Physical Journal C - Particle… (2001)

  7. No Access

    Article

    Fermion masses in a model for spontaneous parity breaking

    In this paper we discuss a left–right symmetric model for elementary particles and their connection with the mass spectrum of elementary fermions. The model is based on the group $SU(2)_{\math...

    Y.A. Coutinho, J.A. Martins Simões… in The European Physical Journal C - Particle… (2001)

  8. No Access

    Article

    Heavy Majorana neutrinos in e + e − → W + W−

    In this paper we investigate the effects of heavy Majorana neutrinos in the reaction e + e − → W + W −. We consider ...

    Y. A. Coutinho, J. A. Martins Simões… in Zeitschrift für Physik C Particles and Fie… (1997)

  9. No Access

    Article

    TheSU L(2)⊗U Y(1)⊗SU*L(2) model in electron-positron collisions

    In this paper we discuss the possibility of an extended electroweak gauge groupSU L(2)⊗U Y(1)⊗SU*L(2). This group could be originated from superstring-inspired models and effective composite models. The model has...

    Y. A. Coutinho, J. A. Martins Simões in Il Nuovo Cimento A (1965-1970) (1996)