Conveners
Theory and BSM
- Alex Tapia (University of Medellin)
Theory and BSM
- Alex Tapia (University of Medellin)
Theory and BSM
- Richard Benavides (Instituto Tecnológico Metropolitano, ITM)
Theory and BSM
- Gabriela Alejandra Navarro (Universidad Antonio Narino (CO))
We study the possibility of obtaining the Standard Model (SM) of particle physics as an effective theory of a more fundamental one, whose electroweak sector includes two non-universal local U(1) gauge groups, with the chiral anomaly cancellation taking place through an interplay among families. As a result of the spontaneous symmetry breaking, a massive gauge boson Z' arises, which couples...
En esta presentación se abordará el concepto de simetrías globales, locales y gauge. Se discutirá el rompimiento espontaneo de una simetría gauge y su relación con el mecanismo de Higgs en teorías de campo cuántico. Este proceso implica una transición de fase donde el parámetro cuadrático adquiere valores negativos, que puede ser obtenida dinámicamente a través de extensiones supersimétricas...
We investigate the recently proposed gauge symmetry
$SU(3)_C \otimes SU(3)_L \otimes SU(3)_R \otimes U(1)_X$,
which naturally embeds both the Left--Right symmetric model and the 3-3-1 framework as subgroups.
Within this unified setting, we introduce four families of leptons and quarks, and perform a systematic study of their contributions to gauge anomaly cancellation for a general value...
We investigate the lepton-flavor-violating (LFV) process $e^- e^+ \to e^- e^+ e\,\mu$ (with $e=e^\pm$ and $\mu=\mu^\pm$) at future circular electron--positron colliders, probing the effective $\gamma\gamma e\mu$ interaction via photon fusion. Using an Effective Field Theory (EFT) framework that respects current theoretical and experimental constraints, we identify three benchmark points (BMPs)...
En este trabajo se analiza la variación de la masa del pión neutro en función de un campo magnético externo, utilizando el Modelo Estándar dentro de la aproximación del límite del gran N. Para ello se recurre al método de Schwinger en el cálculo del propagador de Feynman, en lugar de los métodos algebraico o de integral de trayectoria, debido a que el propagador relativista parece presentar...
Recent experimental results have reported mild deviations from Standard Model predictions in processes involving two photons in the final state, suggesting the possible presence of high-mass scalar resonances at the few-hundred-GeV scale. We investigate these anomalies within the framework of 3-3-1 models, a well-motivated class of extensions of the Standard Model. Focusing on the most...
The long-standing deviations observed in the ratios R(D) and R(D*), which probe lepton flavor universality in semileptonic B meson decays, have motivated extensive studies of new physics scenarios. In this work, we explore an explanation based on a singlet–triplet vector leptoquark model, featuring both $U_1$ and $U_3$ states. We perform a comprehensive fit to the most recent experimental data...
The class of quark-field phase redefinitions for the standard Cabibbo-Kobayashi-Maskawa phenomenological matrix, from the relevant up-bottom, top-down matrix elements to the top-bottom one, produce a phase value consistent with $\pi/2$. This value is derived from standard-model heavy-quark mass restrictions. These stem from the Yukawa and electroweak sector connections through 1)...
In this talk, We will present the results obtained by our group on the decay of the Higgs boson into a Z boson and a photon in the Standard Model up to two-loop accuracy and within the framework of Radiatively-Driven Natural Supersymmetry.
Large-scale structures in the universe can be studied through N bodies interacting gravitationally. In this work, we approximate this process using a quantum dust fluid in one spatial dimension, described by the Schrödinger-Poisson equations. The temporal evolution of the system is calculated using B-splines within the Crank-Nicolson propagator implemented in a predictor-corrector scheme....
The evolution of domain wall networks is essential to understanding our cosmological history. We will consider the scenery after which the degeneracy of the vacuum is broken, and bubbles of the false vacuum will start to collapse. I will discuss the interesting dynamics in these processes, caustics formation, and the fascinating connection to Catastrophe theory and geometric optics through...
An analytic and numerical systematic study of the neutrino mass matrix Mν with one texture zero in a basis where the charged leptons are diagonal, and under the assumption that neutrinos are Dirac particles, is carried through in detail. Our study is done without any approximation, first analytically and then numerically. Current neutrino oscillation data are used in our calculations. The...
Las desigualdades de Leggett-Garg (LG), derivadas bajo la noción de realismo macroscópico (RM), son un análogo temporal de las desigualdades de Bell, y surgen a partir de nuestras intuiciones sobre el comportamiento de sistemas clásicos. Aquí, estas desigualdades se aplican en el contexto de los neutrinos en campos magnéticos, lo cual representa una buena configuración para estudiar los...
The observation of charged lepton flavor violation would be a clear signal of new physics. In this work, we study flavor-violating three-body $\tau$ decays induced by the scalar leptoquarks $R_2$ and $S_1$. We consider a parameter space constrained by the radiative processes $\Delta a_\mu$ and $\ell_i \to \ell_n \gamma$, focusing on flavor structures where only the top or charm quark...
We present a comprehensive theoretical framework for spectral boundary conditions (SBC) in two-dimensional conformal field theory, with particular focus on free boson models with boundaries. Using gamma-matrix formalism, we introduce a boundary helicity operator β = γ₅∂_σ and analyze its eigenvalue spectrum to classify boundary conditions. We investigate three distinct linear homogeneous...
En esta presentación se abordará la producción y emisión de radiación térmica en colisiones de iones pesados relativistas (RHIC y LHC), destacando los métodos de medición empleados en el estudio del plasma de quarks y gluones (QGP). Se introducirán las propiedades fundamentales del QGP, un estado de la materia recreado en colisionadores que alcanza temperaturas y densidades extremas,...
