Examinando por Autor "Queiroz, F.S."
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Ítem 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.Ítem 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 TopicsÍtem 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 disfavoredÍtem Search for dark sector by repurposing the UVX Brazilian synchrotron(Institute for Ionics, 2023-06) Duarte, L.; Lin, L.; Lindner, M.; Kozhuharov, V.; Kuleshov, S.V.; de Jesus, A.S.; Queiroz, F.S.; Villamizar, Y.; Westfahl, H., Jr.We propose the first Search for Dark Sector at the Brazilian Synchrotron Light Laboratory, site of Sirius, a fourth-generation storage ring. We show that UVX, Sirius predecessor, can be a promising dark sector detector, SeDS, with unprecedented sensitivity. The search is based on a 1 - 3 GeV positron beam impinging on a thick target leading the e+e-→ γA′ reaction, followed by a missing mass spectrum event reconstruction. We show that SeDS has the potential to probe dark photons with masses up to 55 MeV and kinetic coupling down to ϵ2∼ 10 - 12 . Therefore, such experiment would constitute the best dark photon probe worldwide in the 10 - 55 MeV mass range, being able to probe an unexplored region of parameter space.Ítem Vectorlike leptons and inert scalar triplet: Lepton flavor violation, g-2, and collider searches(American Physical Society, 2020-08) De Jesus, A.S.; Kovalenko, S.; Queiroz, F.S.; Siqueira, C.; Sinha, K.We investigate simplified models involving an inert scalar triplet and vectorlike leptons that can account for the muon g-2 anomaly. These simplified scenarios are embedded in a model that features W' and Z' bosons, which are subject to stringent collider bounds. The constraints coming from the muon g-2 anomaly are put into perspective with collider bounds, as well as bounds coming from lepton flavor violation searches. The region of parameter space that explains the g-2 anomaly is shown to be within reach of lepton flavor violation probes and future colliders such as HL-LHC and HE-LHC. © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.