MOCa 2023: Materia Oscura en Colombia

Contribution List

7. Sub-GeV multicomponent dark matter

Amalia Betancur Rodriguez (EIA University (CO))

11/05/2023, 13:45

In this talk, I will present a dark matter model at the Sub GeV scale where the dark sector is composed of two scalar dark matter particles and a dark photon. All the particles in the dark sector have masses at the Sub-GeV scale. I will show the constraints from relic abundance and detection prospects in upcoming experiments.

3. Recent developments on multicomponent dark matter scenarios

Carlos E. Yaguna

11/05/2023, 14:25

I will present some recent work on the phenomenology of multicomponent dark matter models based on a ZN symmetry.

10. Deep Learning to study neutrino interactions

Enrique Arrieta Diaz (Universidad del Magdalena)

11/05/2023, 15:05

High Energy Physics is a pioneer in the usage of deep learning applied to image analysis. Several particle physics experiments around the world are developing novel techniques to classify events and identify particles via deep learning algorithms applied to their event images. Neutrino experiments such as NOvA and DUNE are at the front edge of the field, with results that used deep learning to...

4. Z6 – symmetric two-component scalar dark matter

OSCAR ANDRES RODRIGUEZ CIFUENTES

11/05/2023, 16:15

Multi-component scalar dark matter (DM) models based on a single $Z_N$ ($N ≥ 4$) symmetry are simple and well-motivated. In this work, the phenomenology of a $Z_6$ model with two DM candidates is considered. The scalar sector of the Standard Model (SM) is extended with a second doublet and one complex singlet, both charged under the $Z_6$ symmetry. The ordinary SM fields remain neutral. The...

5. Neutrino masses at two-loop in multi-component dark matter Z5 model

BRALLAN ORLANDO TABORDA TORO (Student)

11/05/2023, 16:35

We proposed a radiative seesaw model where the neutrino masses are generated at two loops. We analyzed the phenomenology of the Z5 model for two-component dark matter and neutrino masses. The Z5 symmetry allows interactions that give rise to processes between dark matter particles that affect their relic densities and their detection, which we studied in detail. In a first approach we...

2. Multicomponent dark matter with an Extra Abelian Gauge Symmetry

DAVID ALEJANDRO SUAREZ ROLDAN

11/05/2023, 16:55

We propose a model with a multicomponent and multiflavor dark matter which allows the realization of an effective operator for Dirac neutrino masses. Furthermore, it has an extra Abelian gauge symmetry that is spontaneously broken and generates masses for particles in the dark sector and it is responsible for the stability of dark matter candidates. We explore the parameter space of the model...

8. Enhancing Parameter Exclusion and Extrapolation in Physics Applications with Advanced Machine Learning Techniques: A Phenomenological Perspective

Jose Miguel Munoz Arias (Universidad EIA)

11/05/2023, 17:15

The burgeoning field of machine learning in physics has proven to be an indispensable tool for constraining parameters and augmenting sensitivities across a range of applications. In this study, we present a modern comparison of diverse methodologies for eliminating parameter space regions within a representative toy model. We further introduce a novel machine learning technique, the Attention...

16. Connecting Neutrinos, Majorons and Dark Matter

Carlos Andres Florez Bustos (Universidad de los Andes (CO))

12/05/2023, 08:20

Some theoretical models considering heavy neutrinos have postulated a Goldstone known as the Majoron as a viable dark matter candidate. Our study shows the possibility to detect a Majoron in current and future experiments, considering its lifetime close to the age of the universe, and including existing experimental constrains.

6. Dark matter production in non-standard cosmologies

VALENTINA FRANCO VELASQUEZ (Universidad de Antioquia)

12/05/2023, 09:00

The existence of DM in the universe has been one of the open and more relevant questions in physics and astronomy in the last decades. There is a large number of gravitational evidence about its existence, but no conclusive evidence about its nature as a particle. A worldwide program focused on discovering this particle has been carried out through the previous decades following three major...

11. One hundred years of studies of Rotation Curves of Spiral Galaxies

Camilo Delgado-Correal, Tatiana Ortega Quintero (Universidad de Antioquia)

12/05/2023, 09:20

The standard analysis of the rotation curves of spiral galaxies has led to the proposal of a dark matter component to explain their observed flat behavior. However, alternative models have been proposed to explain this tendency. In this study, we present a comprehensive analysis of the rotation curves in spiral galaxies using various physical theories. Our analysis takes into account recent...

12. Lepton Flavor Violation from diphoton effective operators

Bibiana Marcela Marín Ochoa

12/05/2023, 10:10

We consider lepton flavor violating transitions mediated by the diphoton effective interaction $\ell\ell'\gamma\gamma$ and explore which processes can probe it better. Our analysis includes single and double radiative decays, $\ell\to\ell'\gamma(\gamma)$, as well as $\ell\to\ell'$ conversions in nuclei for all possible flavor combinations. We find that using the current upper bounds on the...

1. Alternative 3-3-1 models for \beta = Sqrt{3}

Eduardo Rojas

12/05/2023, 10:40

We report the most general classification of 331 models with $\beta =\sqrt{3}$. We found several solutions where anomaly cancellation occurs between fermions of different families. These solutions are particularly interesting as they generate non-universal (NU) heavy neutral vector bosons. Non-universality in the SM fermion charges under an additional $U(1)$ gauge group generates Charged...

13. BSM physics searches at neutrino oscillation experiments

David Vanegas Forero (Universidad de Medellín)

12/05/2023, 11:10

Neutrino oscillations, implying massive neutrinos, provided the first direct experimental evidence for physics BSM. In parallel to the 'standard neutrino program' past, current, and future neutrino oscillation experiments have considered, are considering, and will consider, within its physics goals, searches for BSM physics represented by different scenarios. Given the plethora of BSM...

17. Hadron production fraction ratios and his relationship with Search for new physics using B→µµ decays

Jhovanny Andres Mejia Guisao (Universidad de Antioquia (CO))

12/05/2023, 11:40

Rare B meson decays provide a sensitive probe for beyond standard model (BSM) effects. In this talk, some CMS measurements of rare B_{s,d} meson properties will be discussed, including the branching fractions and effective lifetimes.
In addition, the fractions of Bu, Bd, and Bs mesons are denoted by fu, fd, and fs, respectively. Measurements of Bs branching fractions generally rely on ratios...

14. Discussion

15. Discussion

9. DM @ LHC: Searches and possibilities

Jose Ruiz (Universidad de Antioquia (CO))

We examine some of the approaches to search for DM at colliders, and specifically at the LHC. In addition, we develop a more generic approach in order to assess the real possibility of looking for DM at the LHC and how we could confirm a possible discovery.

18. TBA