No significant deviations from the Standard Model predictions have been observed at particle physics experiments, except for neutrino masses. On the other hand, astrophysical evidence for dark matter also points to new physics. In theories beyond the Standard Model of particle physics, neutrino masses and dark matter might have a common origin. Additionally, these theoretical models predict...
Gravitational dynamical friction is expected to cause the orbits of globular clusters to shrink as a function of time. This effect may offer a unique probe of the particle dark matter paradigm. We discuss this effect, and compare the dark matter prediction to observational data of globular cluster-rich, dark matter-dominated dwarf galaxies.
We investigate a novel gravitational wave (GW) production mechanism from gravitons generated during the pre-thermal phase of cosmic reheating, where the energy density is dominated by non-thermalized inflaton decay products, dubbed reheatons. We consider multiple production channels, including: i) pure inflaton-inflaton annihilation, ii) graviton Bremsstrahlung from inflaton decay, iii)...
Cosmological models and predictions rely extensively on the well-established field theory framework of particle physics. However, a qualitatively new challenge arises: cosmological systems inherently contain substances with poorly constrained macroscopic properties and entirely unknown microphysics, such as the inflaton sector, dark matter, and dark energy. This results in a rich array of...
Los rayos cósmicos constituyen un fondo de radiación de extremadamente alta energía que incide sobre la tierra desde más allá del Sistema Solar. Su estudio es de gran importancia por la valiosa información que nos ofrecen del Universo, del Sol y del entorno terrestre cercano. En los años 80 del siglo pasado, J. Linsley sugirió el uso pequeñas redes dispersas de detectores de rayos cósmicos...
In general, Feynman integrals evaluate in terms of complicated transcendental numbers and functions, which arise from their underlying geometries. In this talk, I will first review the type of Feynman integrals that can occur in particle physics phenomenology and in the post-Minkowskian expansion for black-hole scattering. Then, using the methods of differential equations and leading...
El Modelo Cosmológico Estándar, ΛCDM, describe con éxito una amplia gama de observaciones. En este marco, la energía oscura es representada por una constante cosmológica. Sin embargo, resultados recientes de oscilaciones acústicas de bariones (BAO DESI) sugieren que podría tratarse de una componente dinámica. En esta charla se presentan dos modelos parametrizados de energía oscura: uno...
