2nd End-of-Year Particles and Fields mini-workshop

Monday 14 Dec 2020, 13:00 → 18:35 America/Bogota

Instituto de Física - Universidad de Antioquia

Jhovanny Andres Mejia Guisao (Universidad de Antioquia (CO)), Jose Ruiz (Universidad de Antioquia (CO))

El objetivo de este mini-workshop sobre Física de Altas Energías es reunir a algunos de nuestros egresados que se encuentran en este momento haciendo investigación en el extranjero, así como también a físicos teóricos y experimentales en la Universidad de Antioquia, para discutir el progreso reciente en física de partículas, cosmología y áreas relacionadas. El programa abordará una amplia gama de temas, incluyendo el Modelo Estándar y más allá,  física de hadrones y sabores, materia oscura, agujeros negros y física de detectores de muones, que reflejan la variedad de temas existente en nuestros investigadores. La reunión tendrá lugar de forma virtual dadas las actuales restricciones por la pandemia.

Todas las sesiones las haremos a través del siguiente enlace de Meet: https://meet.google.com/dwu-ighi-bfp

13:00 → 15:00 Sesión 1: Sesi

Conveners: Jhovanny Andres Mejia Guisao (Universidad de Antioquia (CO)), Jose Ruiz (Universidad de Antioquia (CO))

13:00 La dispersión elástica coherente neutrino-núcleo como prueba del modelo estándar y la búsqueda de nueva física

Speaker: Blanca Cañas

13:30 SO(n-1,1)-covariant canonical variables for BF gravity

Speaker: Mariano Celada

14:00 Adjusting the weighing scales of greedy supermassive black holes

From our understanding, supermassive black holes are the heaviest punctual objects in the universe. However, because of their condition, they are reluctant to be properly weighted and our last generation scales are still very inaccurate. In this talk, I contextualize the importance of properly weighing them and present our latest efforts oriented to characterize and calibrate the weighing scales of greedy supermassive holes according to the relative inclination, distance and interfering clouds between the weigher and the targeted supermassive black holes.

Speaker: Julian Mejia

15:00 → 15:20 Break 1

15:20 → 17:20 Sesión 2

Conveners: Jhovanny Andres Mejia Guisao (Universidad de Antioquia (CO)), Jose Ruiz (Universidad de Antioquia (CO))

15:20 VBF and Simplified models for DM searches at the LHC

Speaker: Daniel Ocampo Henao (Universidad de Antioquia (CO))

15:30 Observation of the B0s to X(3872) phi decay

Speaker: Andrés Muñoz

15:40 Measurement of properties of Bstomumu decays and search for Bdtomumu decay with the CMS experiment

Speaker: Camilo Torres

15:50 Measurement of the CP-violating phase φs in the BstoJ/ψ φ(1020) channel in proton-proton collisions at 13 TeV

Speaker: Manuel Alejandro Rodriguez Giraldo (Universidad de Antioquia (CO))

16:00 Large area GEM detectors performance and characterization

Speaker: Luis Felipe Ramirez Garcia (Universidad de Antioquia (CO))

MiniWorksopColombia2020.pdf

16:20 Dark Symmetries for all

Speakers: DIEGO ALEJANDRO RESTREPO QUINTERO, Diego Restrepo, Prof. Diego Restrepo (Universidad de Antioquia)

16:50 The Z5 model of two-component dark matter

In this talk we present the phenomenology of the Z5 model for two-component dark matter. This model, which can be seen as an extension of the well-known singlet scalar model, features two complex scalar fields--the dark matter particles--that are Standard Model singlets but have different charges under a Z5 symmetry. The interactions allowed by the Z5 give rise to novel processes between the dark matter particles that affect their relic densities and their detection prospects.

Speaker: Oscar Zapata (Universidad de Antioquia)

17:20 → 17:35 Break 2

17:35 → 18:35 Sesión 3

Conveners: Jhovanny Andres Mejia Guisao (Universidad de Antioquia (CO)), Jose Ruiz (Universidad de Antioquia (CO))

17:35 La Materia Oscura en los Tiempos de los Agujeros Negros Primordiales

Hawking evaporation of primordial black holes (PBH) with masses ranging from ∼10^-1 to ∼10^9 g can generate the whole observed dark matter (DM) relic density. However, a second DM production mechanism, like freeze-out or freeze-in, could have also been active in the early universe. Here we study the interplay of these mechanisms, focusing on the scenario where PBHs dominate the energy density of the universe, leading to a nonstandard cosmological era.

Speaker: Nicolás Bernal (Universidad Antonio Nariño)

bernal.pdf

18:05 Física de Altas Energías en la Frontera Cosmológica

Speaker: José Germán Salazar