Examinando por Autor "Oviedo-Torres, Y.M."

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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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    Flavor changing interactions confronted with meson mixing and hadron colliders
    (American Physical Society, 2023-03) Cárcamo Hernández, A. E.; Duarte, L.; De Jesus, A.S.; Kovalenko, S.; Queiroz, F.S.; Siqueira, C.; Oviedo-Torres, Y.M.; Villamizar, Y.
    We have witnessed some flavor anomalies appearing in the past years, and explanations based on extended gauge sectors are among the most popular solutions. These beyond the Standard Model (SM) theories often assume flavor-changing interactions mediated by new vector bosons. Still, at the same time, they could yield deviations from the SM in the K0 − K¯ 0, D0 − D¯ 0, B0 d − B¯ 0 d, and B0 s − B¯ 0 s meson systems. Using up-to-date data on the mass difference of these meson systems, we derive lower mass bounds on vector mediators for two different parametrizations of the quark mixing matrices. Focusing on a well-motivated model based on the fundamental representation of the weak SU(3) gauge group, we put our findings into perspective with current and future hadron colliders to conclude that meson mass systems can give rise to bounds much more stringent than those from high-energy colliders and that recent new physics interpretations of the b → s and RðD Þ anomalies are disfavored