Banca de DEFESA: YOXARA SÁNCHEZ VILLAMIZAR

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : YOXARA SÁNCHEZ VILLAMIZAR
DATE: 07/02/2023
TIME: 14:00
LOCAL: online
TITLE:

Physics Beyond the Standard Model: Muon Anomalous Magnetic Moment and Collider Phenomenology

KEY WORDS:

Beyond the Standard Model, Muon Anomalous Magnetic Moment, High-
Luminosity, High-Energy, Future Hadron Collider, collider physics, Dark Matter,
FCNC, Meson Oscillation.

PAGES: 182
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

Several open problems in the Standard Model call us to search for new physics.
In this work, we investigate viable solutions to these issues. We focus on models based
on an extended gauge group, known as 3-3-1 models. Considering the result from
the gµ − 2 experiment E989 at Fermilab laboratory, we assess whether 3-3-1 models
can explain the anomaly observed by the gµ − 2 collaboration, which favored a new
physics’ interpretation with over 4σ of confidence level at the beginning of 2020. Later,
we discuss how these 3-3-1 models could be extended to successfully explain the gµ − 2
anomaly while agreeing with current and future colliders. Further, we dive into the de-
tails of the 3-3-1 models and carry out a Monte Carlo Simulation of the Large Hadron
Collider to obtain lower mass bounds on the masses of the new gauge bosons, namely
the Z ′ field. Moreover, we forecast the mass reach for the Z′ gauge boson in the LHC
at High-Luminosity and High-Energy. Given that dark matter is present in several
models discussed in this thesis, we therefore investigate the interaction between the
dark matter in one of these models known as 3-3-1 LHN and collider searches. Our
results also compare the experimental relic density of dark matter with our candidates.
Besides, numerous flavor anomalies have emerged recently. Then, we assume flavor-
changing interactions mediated by a gauge boson Z′ , at tree level, analyzing the SM
0
0
deviations in the K 0 − K , D 0 − D , Bd0 − B0 d and Bs0 − B0 s meson systems. Here, we use
updated data on the mass difference of the four meson systems, and we derive lower
mass bounds on Z′ at two different parameterizations of the quark mixing matrices. By
focusing on a model based on the SU(3) gauge group, we put our results in perspective
with current and future hadron colliders to conclude that mass meson systems can give
rise to much more stringent bounds than those at high-energy colliders and that recent
new physics interpretations of the b → s and R( D ∗ ) anomalies are unfavorable.

COMMITTEE MEMBERS:
Externo à Instituição - SANDRO FONSECA DE SOUZA - UERJ
Externo à Instituição - ALEX GOMES DIAS - UFABC
Externo à Instituição - ALEXANDRE ALVES - UNIFESP
Interno - 1043096 - FARINALDO DA SILVA QUEIROZ
Externo à Instituição - GUSTAVO GIL DA SILVEIRA - UFRGS
Externo à Instituição - VICTOR PAULO BARROS GONÇALVES - UFPel