Axion-like particles (ALPs) can behave as a wave-like dark matter medium, and their interactions with photons may leave observable imprints in astrophysical environments. In this talk, I will show how pulsar arrays can act as sensitive detectors of ALP effects through birefringence signatures observed in polarimetric measurements. We use high-precision polarimetry data from the Parkes Pulsar...
We analytically study cosmological evolution in a flat FLRW spacetime in the context of modified STEGR gravity or f(Q), using an exponential two-parameter model which represents a smooth perturbative expansion around the ΛCDM model. The cosmological analysis is carried out by calculating the Hubble parameter as a function of redshift, for selected values of the parameters. The Hubble parameter...
We revisit a recently proposed framework in which dark matter (DM) consists of pions originating from a strongly interacting hidden sector analogous to QCD. A non-vanishing topological theta angle plays a central role by inducing resonant number-changing interactions that can account for the observed DM relic abundance and yield velocity-dependent DM self-interactions. We investigate the...
Sub-GeV dark matter has gained significant attention due to its experimental accessibility for both direct detection searches and neutrino studies. In this work, we present a theoretical model introducing two new bosonic particles beyond the Standard Model: a vector boson and a scalar boson. The model establishes two distinct interaction portals connecting these mediator particles with...
Los agujeros negros primordiales (PBH's) han resurgido como una alternativa atractiva ante la falta de detección directa de partículas de materia oscura convencionales como los WIMP's. En esta charla se presentará una revisión fenomenológica sobre la viabilidad de los PBH's como constituyentes de una fracción significativa de la materia oscura.
Se abordarán los escenarios cosmológicos que...
We investigate the nature of the electroweak phase transition (EWPT) in a minimal $Z_6$-symmetric extension of the Standard Model, featuring a fermionic dark matter candidate ($\psi_L,\psi_R$) and a real scalar singlet ($\phi$). Selecting benchmark points that satisfy both the observed dark matter relic density and direct detection constraints, we analyze whether the EWPT is first-order in...
Early matter-dominated epochs and non-standard cosmological scenarios are frequently motivated by top-down constructions and UV completions of beyond-Standard Model physics. Scalar fields, as natural extensions to the Standard Model of particles, provide a well-studied framework for exploring deviations from the concordance cosmological model and might play a crucial role in dark matter...
En el contexto del Modelo con Dos Dobletes de Higgs tipo III (M2DH-III), se obtienen las expresiones analíticas exactas para las matrices de masa y de mezcla de los neutrinos ligeros activos, generadas mediante el Mecanismo See-Saw tipo I (MSS-I), introduciendo una simetría de sabor permutacional S3. Para ello, se construye inicialmente el lagrangiano de Yukawa extendido, incorporando el...
Se presenta física más allá del Modelo Estándar de partículas a través de un modelo compuesto que incorpora el mecanismo de Froggatt-Nielsen, ofreciendo nuevas posibilidades para explicar el origen del sabor en el sector leptónico. Se analiza la interacción entre la composición parcial de los fermiones y una simetría horizontal $U(1)$ para describir las jerarquías de masas y los ángulos de...
In the current era of high-precision measurements of neutrino oscillation parameters, both current and upcoming experiments provide powerful opportunities to probe physics beyond the Standard Model. One such avenue is the possibility of invisible neutrino decay, a scenario in which neutrinos decay into undetectable final states, leading to distortions in the observed oscillation patterns. In...
In this talk we present an variation of the Scotogenic Model, that extends the gauge group by a global U(1) symmetry, and a singlet scalar that induces Spontaneous Symmetry Breaking to explain the origin of both Majorana Masses and Lepton number violation. Then, we make a brief analysis of the compatible parameter space for both fermionic and scalar dark matter, which can be considered in a...
En el contexto del sistema de calibración del sensor de fotones del detector lejano del proyecto DUNE se requiere realizar la implementación de una tecnología innovadora llamada Power over Fiber la cual, a grandes rasgos, consiste en transmitir energía proporcionada por un láser de alta potencia a través de fibra óptica.
Para cumplir con este objetivo es necesario contar con fibras ópticas...
Classical simulations of neutrino oscillations faces multiple computational challenges such as simulating collective neutrino systems (e.g. inside of core collapse supernovae) and incorporating complex quantum effects (matter effects, quantum decoherence in a dense medium). These challenges can be overcome using quantum simulation as these can emulate different quantum systems rather than...
We investigate current and projected constraints on Higgs-portal dark matter (DM) models, focusing on both scalar and fermionic DM candidates, using vector boson fusion (VBF) production of the Higgs boson at the LHC. By analyzing the parameter space in the plane of DM mass versus the Higgs-DM coupling, we aim to reinterpret existing LHC VBF + MET searches to set bounds on the invisible Higgs...
We investigate the potential to search for dark matter within a simplified model that introduces a new scalar/vector resonance connecting the Standard Model (SM) to the dark sector composed by a Dirac fermionic dark matter particle. This mediator couples to SM vector bosons, including gluons, giving rise to novel Vector Boson Fusion (VBF) topologies. These allow for the exploration of such...
This analysis studies the IceCube's ability to test, phenomenologically, the presence of sterile neutrinos states in the context of the 3+2 model. As the neutrino mass splitting ∆m²∼1eV² can distort the angular and energy distributions of reconstructed muon events at the scale of a few TeV, where IceCube detection is highly optimized, it is a great opportunity to test sterile neutrino...
Desde la teoria corpuscular de la gravedad de Lesage-Q Majorana, presentamos un modelo alternativo del sol,que permite explicar la paradoja de los neutrinos solares y plantear algunos candidatos como gravitones, ademas de posibles relaciones con la materia y energia oscuras,los resultados obtenidos son acordes con las mediciones gravimetricas conocidas.
1. Roley J.K.., Cleveland B.T.,...
