Examinando por Autor "Villamizar, Y.S."

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    Constraining 3-3-1 models at the LHC and future hadron colliders
    (American Physical Society, 2022-09) Alves, A.; Duarte, L.; Kovalenko, S.; Oviedo-Torres, Y.M.; Queiroz, F.S.; Villamizar, Y.S.
    In this work, we derive lower mass bounds on the Z0 gauge boson based on the dilepton data from the Large Hadron Collider (LHC) with 13 TeV of center-of-mass energy, and forecast the sensitivity of the high-luminosity LHC with L ¼ 3000 fb−1, the high-energy LHC with ffiffi s p ¼ 27 TeV, and also at the Future Circular Collider with ffiffi s p ¼ 100 TeV. We take into account the presence of exotic and invisible decays of the Z0 gauge boson to find a more conservative and robust limit, different from previous studies. We investigate the impact of these new decay channels for several benchmark models in the scope of two different 3-3-1 models. We found that in the most constraining cases, LHC with 139 fb−1 can impose mZ0 > 4 TeV. Moreover, we forecast high-luminosity LHC, high-energy LHC, and Future Circular Collider reach, and derive the projected bounds mZ0 > 5.8 TeV, mZ0 > 9.9 TeV, and mZ0 > 27 TeV, respectively. Lastly, we put our findings into perspective with dark matter searches to show the region of parameter space where a dark matter candidate with the right relic density is possible.
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    Dead or alive? Implications of the muon anomalous magnetic moment for 3-3-1 models
    (Elsevier B.V., 2020-10) de Jesus, A.S.; Kovalenko, S.; de S. Pires, C.A.; Queiroz, F.S.; Villamizar, Y.S.
    We have witnessed a persistent puzzling anomaly in the muon magnetic moment that cannot be accounted for in the Standard Model even considering the existing large hadronic uncertainties. A new measurement is forthcoming, and it might give rise to a 5σ claim for physics beyond the Standard Model. Motivated by it, we explore the implications of this new result to five models based on the SU(3)C×SU(3)L×U(1)N gauge symmetry and put our conclusions into perspective with LHC bounds. We show that previous conclusions found in the context of such models change if there are more than one heavy particle running in the loop. Moreover, having in mind the projected precision aimed by the g-2 experiment at FERMILAB, we place lower mass bounds on the particles that contribute to muon anomalous magnetic moment assuming the anomaly is otherwise resolved. Lastly, we discuss how these models could accommodate such anomaly in agreement with current bounds. © 2020 The Author(s) Learn about these Topics