Conveners
Morning: W' model and B meson anomalies. (Cristian Garcia)
- cristian garcia
Morning: Distribution amplitudes of pseudoscalar amd vector mesons on the light front (Bruno El- Benich)
- Bruno El-Bennich (Universidade Cruzeiro do Sul)
Morning: Singlet vector leptoquark model facing current B meson data. (Nestor Quintero)
- Nestor Quintero Poveda (Universidad Santiago de Cali)
Morning: Quark mixing matrix from mass matrices with the maximum number of texture zeros. (Yithsbey Giraldo)
- Yithsbey Giraldo Úsuga (Universidad de Nariño)
Morning: Una breve historia de la física de particulas. (Eduardo Rojas)
- Eduardo Rojas
Morning: TEXTURE ZEROS FOR DIRAC NEUTRINOS. (William Ponce)
- WILLIAM ANTONIO PONCE GUTIERREZ
Morning: Simetrías y leyes de conservación en mecánica clásica (German Ramos)
- German Ramos
Morning: Física del sabor en la UT (Carlos Vera)
- Carlos Vera (Universidad del Tolima)
Description
In recent years, evidence of Lepton Flavour Universality Violation has been observed in semi-leptonic decays associated with the charged-current transition 𝑏→𝑐𝑙𝜈 ̅ by BABAR, Belle and LHCb experiments, up to 3 standard deviations (3σ). While for the neutral-current transition 𝑏𝑏 ̅→𝑙^+ 𝑙^−, the BABAR collaboration in 2020 reported a discrepancy of 1.8σ in the leptonic decay of the ϒ(3s) meson. Since the new physics operator that modifies the charged transition also contributes to the neutral process, in this work we study the impact of these measurements on a new physics model consisting of an extra triplet of left-handed vector-bosons (W', Z') that coupled preferably to fermions of the third family. We observe that this model cannot simultaneously explain the recent measurement obtained by BABAR for ϒ(3s) and the observables given by the transition 𝑏→𝑐𝑙𝜈 ̅.
We present a model able to solve the neutral and the charged anomalies. A discussion about the low energy and LHC constraints on these processes is presented.
In this work we carry out an exhaustive study to find quark mass matrices in the Standard Model (SM), with the maximum number of texture zeros consistent with the experimental data. We found four viable configurations of five texture zeros that adjust the quark masses, the mixing angles and the CP violation phase, with deviations below 1σ level respect to the current SM best fit values. One of...
