Satellite galaxies experience multiple physical processes when interacting with their host halos, often leading to the quenching of star formation. In the Local Group, satellite quenching has been shown to be highly efficient, affecting most satellites except the most massive ones. While recent surveys are studying Milky Way analogs to assess how representative our Local Group is, the dominant...
The ALICE collaboration has recently reported pi+-K_S femtoscopic correlations in pp collisions[1]. Here we show [2] how they can be well described using existing realistic pi-K interactions obtained from a dispersive analysis of scattering data [3], containing an accurate description of the kappa/K0*(700) resonance pole. [1] . Acharya et al. (ALICE), Phys. Lett. B 856, 138915 (2024),...
The study of the first galaxies which contributed to the ionization of the universe will become possible with an integral field and multi-object spectrograph like MOSAIC (significant contribution from GUAIX), set to be installed on the 39m Extremely Large Telescope (ELT), currently under construction. As a pilot study for that, a detailed two-dimensional study of the physical properties of a...
The CIEMAT Gamma-Ray Astronomy group works within the MAGIC and CTA-LST collaborations, covering a wide range of activities from hardware development and testing to data analysis and scientific research. This talk will summarize our main contributions and their role in advancing gamma-ray astrophysics.
In order to find Earth-like planets in the habitable zone of M dwarfs, it becomes essential to quantify the stellar noise in the radial velocity (RV) data in order to measure planetary signals. This is why the use of multidimensional Gaussian processes can be a clear evolution towards the study and characterisation of exoplanets and their host stars, this will be done using the pyaneti...
We consider a Bubble Expansion mechanism for the production of scalar dark matter during a first-order phase transition in the early Universe. Seeking for a dark matter energy density in agreement with observations, we study different renormalizable and non-renormalizable interactions between the dark matter species and the field undergoing the transition, considering all the possible regimes...
We reflect on the possibility of breaking the diffeomorphism (Diff) invariance in the gravitational couplings of matter down to only transverse diffeomorphisms (TDiff), and study the consequences on scalar field theories. We begin by analyzing the general implications of this restricted symmetry for a single scalar field within a general setting. Afterwards, we study the cosmological scenario...
These past years the theoretical particle physics community has been, once more, gradually shifting their attention to the phenomenology of highly energetic processes. And rightfully so, as the next big project in the particle physics landscape, the EIC (Electron-Ion Collider), while still undergoing construction, is expected to enter commission with the coming of the new decade. The EIC will...
General Relativity theoretically allows the formation of black holes through the gravitational collapse of purely electromagnetic radiation. However, this scenario would involve electromagnetic strengths surpassing the critical Schwinger limit, resulting in the generation of electron-positron pairs. This quantum phenomenon counteracts the collapse, with the created particles scattering out of...
LHCb has observed giant CP violation in localized regions of the Dalitz plots of B to three charmless light mesons. This has been interpreted as an enhancement due to strong two-body final state interactions. In this talk, we show how such interactions, described with dispersive analyses of data, can be implemented beyond the leading order expansion in the two-body re-scattering amplitude.
Understanding the mechanisms governing star formation in galaxies is key to unravel their evolution. This work employs Bayesian statistics and data mining techniques to analyze metallicity gradients, which provide valuable insights into the processing and enrichment of gas in galaxies. A notable trend is the manifestation of the downsizing effect the in resolved properties of galaxies, where...
Imaging Atmospheric Cherenkov Telescopes (IACT) use combined analog and digital electronics for their trigger systems, implementing simple but fast algorithms. Such trigger techniques are forced by the extremely high data rates and strict timing requirements. In recent years, in the context of a new camera design for the Large-Sized Telescopes (LSTs) of the Cherenkov Telescope Array (CTA)...
