Examinando por Autor "Queiroz, Farinaldo S."

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    An extended 3-3-1 model with radiative linear seesaw mechanism
    (Elsevier B.V., 2022-06-10) Cárcamo Hernández, A.E.; Kovalenko, Sergey; Queiroz, Farinaldo S.; Villamizar, Yoxara S.
    Motivated by the recent muon anomalous magnetic moment (g-2) measurement at FERMILAB and non-zero neutrino masses, we propose a model based on the SU(3)C×SU(3)L×U(1)X (3-3-1) gauge symmetry. The most popular 3-3-1 models in the literature require the presence of a scalar sextet to address neutrino masses. In our work, we show that we can successfully implement an one-loop linear seesaw mechanism with right-handed neutrinos, and vector-like fermions to nicely explain the active neutrino masses, and additionally reproduce the recent Muon g-2 result, in agreement with existing bounds. © 2022 The Author(s)
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    Rare kaon decay to missing energy: Implications of the NA62 result for a Z′ model
    (American Physical Society, 2021-06) De Melo, Téssio B.; Kovalenko, Sergey; Queiroz, Farinaldo S.; Siqueira, C.; Villamizar, Yoxara S.
    Meson decays offer a good opportunity to probe new physics. The rare kaon decay K+→π+νν¯ is one of the cleanest of them and, for this reason, is rather sensitive to new physics, in particular, vector mediators. The NA62 Collaboration, running a fixed-target experiment at CERN, recently reported an unprecedented sensitivity to this decay, namely a branching fraction of BR(K+→π+νν¯)=(11-3.5+4.0)×10-11 at 68% C.L. Vector mediators that couple to neutrinos may yield a sizeable contribution to this decay. Motivated by the new measurement, we interpret this result in the context of a concrete Z′ model, and put our findings into perspective with the correlated KL→π0νν¯ decay measured by the KOTO Collaboration, current, and future colliders, namely the High-Luminosity and High-Energy Large Hadron Collider. © 2021 authors. Published by the American Physical Society.