Conveners
Theory - Phenomenology
- Oscar Zapata (Universidad de Antioquia)
- Alexander Moreno Briceño (Universidad Antonio Nariño)
- Eduardo Rojas
The Fermilab Muon g−2 collaboration has recently released its first measurement of (g−2)μ. This result is consistent with previous Brookhaven measurements and together they yield a statistically significant 4.2σ discrepancy with the Standard Model prediction. BSM solutions to (g−2)μ feature light weakly coupled neutral particles (Singlet Scenarios) or heavy strongly coupled charged particles...
We study the possibility of obtaining the standard model of particle physics as an effective theory of a more fundamental one, whose electroweak sector includes two non-universal local U(1)'s gauge groups.
We present a pedagogical Mathematica package, so-called SpaceMath, for Beyond the Standard Model (BSM) parameter space searches. In this first version, SpaceMath v1.0 works with the Higgs boson data (HBD). These results are the most up-to-date experimental measurements made at the Large Hadron Collider (LHC) and the expected results at future colliders, namely, High Luminosity LHC, High Energy...
we investigate the consequences of the Renormalization Group Equation (RGE) in the determination of the effective potential and the study of Dynamical Symmetry Breaking (DSB) in a massless Abelian Higgs (AH) model with N-component complex scalar field in (3+1) dimensional spacetime. The classical Lagrangian presents scale invariance, which is broken by radiative corrections to the effective...
The $R_{D^{(\ast)}}$ Anomaly is a taint in the Lepton Flavor Universality. With recent data the anomaly has a statistical significance more than $3 \sigma$ between BaBar, LHCb and Belle. Many theoretical models had been proposed to solve this problem, extending the Standard model in different sectors. In this talk we will discuss about the road to look for a charged mediator in two different...
El oscilador armónico es uno de los temas fundamentales que es punto de partida para el estudio de diversas ramas de la física, desde el estudio en la mecánica clásica hasta el estudio en mecánica cuántica, por tanto, ha sido estudiado exhaustivamente. En este trabajo se resuelve la ecuación de Schoringuer unidimensional en el enfoque de Madelung-Bohm para la mecánica cuántica, el ansatz que...
We review in a systematic way how anomaly free $SU(3)_c\otimes SU(3)_L\otimes U(1)_x$ models without exotic electric charges can be constructed, using as basis closed sets of fermions which includes each one the particles and antiparticles of all the electrically charged fields. Our analysis reproduce not only the known models in the literature, but also shows the existence of several more...
A model is proposed where the fermionic and scalar fields are charged under a Peccei-Queen (PQ) symmetry. The PQ charges are chosen in such a way that they can reproduce mass matrices with five texture zeros that can reproduce the masses of the Standard Model (SM) fermions, the CKM matrix and the PMNS matrix. To obtain this result, at least 4 Higgs doublets are needed. As we will see in the...
The generalized symplectic formalism quantization method, which is equivalent to that Dirac, is employed to study the gauge invariance Proca's electrodynamics theory on the null-plane. We show that the zero modes of the symplectic matrix are the generators of the gauge transformation. After fixing the gauge, the generalized brackets are calculated.
In this work, we present a solution of the experimental anomaly in $g-2$ for the $Z^\prime$ charges allowed by the anomaly equations and the constraints coming from the Yukawa Lagrangian terms.
The $Z^\prime$ considered here has a minimum fermion content, i.e., our models contain only the standard model fermions, 3 right-handed neutrinos, and one exotic charged lepton. The allowed parameter...
In a model with additional U(1) gauge symmetry, free of anomalies, the mass of the active neutrinos are generated by type I see saw mechanism by introducing two right handed neutrinos. The muon and tau get mass at the tree level and the masses of the electron is generated by effective operators of dimension 7 by introducing a Lambda scale. Using a Monte Carlo, the model parameters are...
In a model with additional U(1) symmetry, anomaly free, the mass of the active neutrinos is generated by the inverse see saw mechanism. The muon and tau get masses at the tree level and the mass of the electron is generated by effective operators of dimension 7 by introducing a Lambda scale. Using a Monte Carlo simulation, the model parameters are adjusted according to the mass of the charged...
We investigate a scenario inspired by natural supersymmetry, where neutrino data is explained within a low-scale seesaw scenario. For this the Minimal Supersymmetric Standard Model is extended by adding light right-handed neutrinos and their superpartners, the R-sneutrinos. Moreover, we consider the lightest neutralinos to be higgsino-like. We first update a previous analysis and assess to...
The ratios $R_{\tau/P}\equiv \Gamma(\tau \to P \nu_\tau [\gamma]) / \Gamma(P \to\mu \nu_\mu[\gamma])$ ($P=\pi, K$) provide sensitive tests of lepton universality $\left|g_\tau/g_\mu\right|=1$ and are a useful tool for new physics searches. The radiative corrections to $R_{\tau/P}$ are computed following a large-$N_C$ expansion to deal with hadronic effects: Chiral Perturbation Theory is...
