High-energy gamma rays, cosmic rays, and neutrinos are messengers of violent astrophysical phenomena and probes of fundamental physics at extreme energies. Tremendous experimental advance has unlocked vast potential for progress in both directions. First, I will present the basics of high-energy particle production at astrophysical sites. Then I will showcase the main lessons learned and...
High-elevation particle detectors have opened a new observational window in Astronomy, significantly increasing the number of detected gamma-ray sources in the very- to ultra-high energy range. In particular, these instruments were able to achieve unprecedented sensitivity above 100 TeV and detected gamma-ray emission from sources up to PeV. The recent successes have all been obtained from the...
The LHCb detector at the LHC is a forward spectrometer designed for the study of CP violation and rare decays of c- and b-hadrons. During Runs 1 and 2, it accumulated the largest samples of these hadrons in the world and contributed to a broad range of physics topics beyond its original purpose. The status of the experiment is discussed, together with a review of the latest physics results,...
Leptonic CP violation is yet to be confirmed as an additional source of CP violation in fundamental interactions.
We study the case where leptonic CP violation is spontaneous and is induced by the mixing with a heavy charged vector-like lepton (VLL).
We show that the non-decoupling of this VLL is linked with the presence of CP violation and its coupling with the SM leptons are partly fixed...
We show that convection cells in the stellar photosphere generate plasma waves by a process akin to sonic booms and Zeldovich superradiance. Our theoretical approach is based on the Markovian master equation for each mode of the quantum field corresponding to such waves. For the Sun, this mechanism is most efficient in quiet regions with small magnetic fields. Energy is mostly carried by...
I will consider some examples of Dark Matter (DM) models where the DM can be described by a collection of oscillating (scalar, vector or tensor) waves. I will present the basic phenomenology and recent results on some observational probes that are useful to probe models of ultra-light DM.
Measurements of multiboson production at the LHC are fundamental probes of the electroweak gauge structure of the Standard Model. With the large data samples from the LHC, processes involving quartic gauge boson couplings are now accessible. In this talk we present recent ATLAS results of quartic interactions including measurements with three gauge bosons in the final state. These results are...
In the last two decades, cosmic ray muon-based imaging, or muongraphy, has undergone tremendous development and has found applications in different fields that require penetrating probes in large or high-density volumes. The unique characteristics of this technique make it particularly important for applications including nuclear non-proliferation, spent nuclear reactor fuel monitoring, cargo...
Various Supersymmetry (SUSY) scenarios, including split SUSY and anomaly or gravity-mediated SUSY-breaking scenarios, lead to signatures with long-lived particles. Searches for these processes may target either the long lived particle itself or its decay products at a significant distance from the collision point. These signatures provide interesting technical challenges due to their special...
The aim is to review the theory developments for the production of the Dirac magnetic monopole,and the monopolium,and establish their limits for pp collisions.The mass range used for the monopole is based on recent results of ATLAS and MoEDAL, and the simulations are made for the current LHC anergies and for the energies of the future colliders HE-LHC and FCC. The cross sections are calculated...
Searches for pairs of Higgs bosons will be, in all likelihood, important tools both to precisely measure the properties of the Higgs boson and to probe new physics at the High-Luminosity LHC and beyond. This process allows to measure the boson's self-coupling $\lambda_{hhh}$, which would reveal clues about the early universe and the dynamics of electroweak symmetry breaking. We extend current...
In the context of String theory, the Swampland is the set of consistent field theories that cannot be completed into quantum gravity in the ultraviolet regime. Thus, the string theories lead to huge amount of effective-low energy theories, and the swampland is the collection of effective theories that cannot come from string theory. Therefore, it is very useful to find constraints over the...
In this study we evaluate the performance of various machine learning (ML) algorithms for discriminating a SUSY signal from its standard model backgrounds in order to enhance the significance of finding these hypothetical particles. For this aim, we use a case of study of Monte Carlo production of SUSY top squarks from proton collisions at $\sqrt{s}=13$ TeV with a luminosity of 140 fb$^{-1}$,...
In the era of information technology higher education and resarch is rapidly globalizing, links scientists institutions, society and industry are strengthened and discussions about adopting Open Science principles is on the table. Virtual Learning Comunities (VRLC) play a fundamental role in modernization and internationalization of higher education. VRLCs create new opportunities:...
In this work we investigate an extension of the SM with Left-Right symmetry that includes additional mirror fermions, copies of the SM fermions with opossite quirality and charged under the $SU(2)_R$. The motivation for introducing these mirror fields in a Left-Right extension is to analyse the well known CP problem. We have propose a candidate for dark matter which arises from the mixture of...
In this talk, I will review what have we learned in neutrino physics in the last years and what we hope to learn in the coming ones.
DUNE (Deep Underground Neutrino Experiment) represents one of the most important experimental programs in the current and future scenario of neutrino physics. It will be the first mega-science project on the US sole, involving more than 1,300 physicists and more than 200 Institutions. DUNE will shade light on some of the crucial open questions in neutrino physics: the CP violation in the...
ANDES (Agua Negra Deep Experiment Site) is an underground laboratory proposed to be built inside the Agua Negra road tunnel that will connect Chile (IV Region) with Argentina (San Juan Province) under the Andes Mountains. The Lab will be 1750 meters under the rock, becoming the 3rd deepest underground lab in the world, the first in South America and the largest in the Southern Hemisphere....
The Deep Underground Neutrino Experiment (DUNE) is a long baseline, neutrino oscillation experiment designed to measure Charge Parity Violation in the neutrino sector using liquid argon as the primary detector medium. DUNE's main physics program is centered around measuring the flavor profile of beams in neutrino and anti-neutrino modes, as a function of energy, both at the near and the far...
Linearized gravity in the Very Special Relativity (VSR) framework is considered. We prove that this theory allows for a non-zero graviton mass $m_g$ without breaking gauge invariance nor modifying the relativistic dispersion relation. We find the analytic solution for the new equations of motion in our gauge choice, verifying as expected the existence of only two physical degrees of freedom....
We have studied how local density perturbations could reconcile the Hubble tension. We reproduced a local void through a perturbed FLRW metric with a potential $\Phi$ which depends on both time and space. This method allowed us to obtain a perturbed luminosity distance, which is compared with both local and cosmological data. We got a region of local parameters, $q_0^\text{Lo}$ and...
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) aims to detect the coherent elastic neutrino-nucleus scattering (CEvNS) of reactor antineutrinos off silicon nuclei using fully depleted high-resistivity charge-coupled devices (CCDs). The detector is located at a distance of 30 m from the core of the 3.8 GW Angra 2 nuclear reactor in Rio de Janeiro, Brazil. With an active mass of...
We implemented in the popular Boltzmann solver CLASS a holographic dark energy (HDE) model with two infrared (IR) cut-offs: the Ricci scalar curvature (RDE) and its more general version the Granda-Oliveros (GO). For the background, we show that the HDE density using the GO cut-off can exhibit radiation, matter, or DE behavior depending on the component that dominates the energy...
In local Abelian symmetries extra SM-singlet chiral fermions must be introduced to cancel out the anomalies. We study the conditions to choose a subset of them as the right-handed companions of effective Dirac neutrino masses along with the dark matter candidates on dark sectors that also can generate the required asymmetry between matter and antimatter in the Universe
The Dimension-5 Seesaw Portal is a Type-I Seesaw model extended by $d = 5$ operators involving the sterile neutrino states, leading to new interactions between all neutrinos and the Standard Model neutral bosons. In this work we focus primarily on the implications of these new operators at the GeV-scale. In particular, we recalculate the heavy neutrino full decay width, up to three-body...
We present the Hamiltonian formulation of the gravitational sector of the Standard-Model-Extension, which introduces the breaking of diffeomorphism symmetry through explicit background fields. The modified gravity theory is shown to require an extension of the Gibbons-Hawking-York boundary term and to produce Hamilton-Jacobi equations of motion that are equivalent to the projected modified...
Knowledge of the Earth’s interior composition is highly relevant to many geophysical and geochemical problems. Neutrino oscillations are modified in a non-trivial way by the matter effects. They can provide valuable and unique information not only on the density but also on the chemical and isotopic composition of the deep regions of the planet. In this presentation, we examine the possibility...
The Latin American Giant Observatory (LAGO) project consists of an extensive non-centralized network of Water Cherenkov Detectors (WCD) operated by a collaborative network of Universities and Research Institutes in Iberoamerica. The detectors of the network are built on the basis of commercial water containers, so they could have different geometries (but mostly cylindricals), different water...
In this work we show a study of the generation of neutrino masses is carried out from the Seesaw type II Mechanism for Dirac neutrinos. These mechanisms not only explain the mass of the neutrino but also its small value compared to charged quarks and leptons. Therefore, a model is proposed to obtain the small neutrino masses by extending the visible content of the Standard Model (SM) with a...
From Quantum Field Theory (QFT) for non-perturbative systems, the Schiwnger-Dyson equations (SDE) are obtained, which are analogous to the Euler-Lagrange equations in QFT, since they are the equations of motion of the Green's functions . The SDEs are an infinite set of integral equations coupled to each other and it is only possible to solve them by means of a truncation scheme. The...
In this work, we construct a traversable wormhole by providing a suitable embedding function ensuring the fulfilling of the flaring--out condition. The solution contains free parameters that are reduced through the study of the acceptable conditions of a traversable wormhole. We compute both the quantifier of exotic matter and the quasi--normal modes through the $13^{th}$ order WKB as a...
The BeEST experiment uses Superconducting Tunnel Junction (STJ) particle
detectors to search for sub-MeV neutrino masses states by precisely measuring the daughter recoil energy following the Electron Capture (EC) decay of 7Be. In order to study systematic errors of the detector, we have estimated the Electron Shaking Probability (ESP) in the L-capture peak of the 7Be nuclear EC decay...
We study the Schwinger Model on the null-plane using the
Faddeev-Jackiw procedure for constrained systems. The generalized
symplectic formalism quantization method determine the zero modes
of the symplectic matrix and the generators of the gauge
transformation. After fixing the null-plane gauge, the generalized
brackets are calculated and the commutation relations of the theory
are deduce.
Subsequent to the release of CERN Open Data, the emergence of a variety of challenges awakened the curiosity and interests of scientists from different disciplines to attack them from their own expertise, among them computer science. The past few years have seen a high growth in the take-up of ML by the accelerator community in Deep Learning developments, for ML is noticeably a key tool to...
We calculate radiative corrections to the differential decay rate of the process $\Omega^{-}\rightarrow\Xi^{0}+\bar{\nu}_{e^{-}}+e^{-}$
following the method used by Sirlin. Radiative corrections can be separated into model-independent and model-dependent parts. Here we consider only the independent part of the model and the Dalitz plot of this decay is obtained from it. This method has been...
We present a detailed study of a proposed model to explain the experimental hints of new physics in B meson decays within the frameork of the Pati-Salam unification. The model is based on the local gauge group $\mathrm{SU}(4)_L \otimes \mathrm{SU}(4)_R \otimes \mathrm{SU}(2)_L \otimes \mathrm{U}(1)'$ and part of its gauge bosons are $(3,1)_{2/3}$ vector leptoquarks. The key feature of the...
In this work we study an effective version of the 3-3-1 model, in which the particle content is the same of the 2HDM. We show that the inherited structure from the $SU(3)_C \otimes SU(3)_L \otimes U(1)_X$ gauge group has a series of consequences, the most relevant one being the prediction of the masses of the neutral scalar to be of the order or lower than the mass of the charged scalar. Given...
We review in a systematic way how anomaly free $SU(3)_c\otimes SU(3)_L\otimes U(1)_x$ models without exotic electric charges can be constructed, using as basis closed sets of fermions which includes each one the particles and antiparticles of all the electrically charged fields. Our analysis reproduces not only the known models in the literature, but also shows the existence of several more...
To date, the CMS Collaboration has published a large part of its data collected during the LHC's Run1 and early Run 2 epochs.
These data have provided an unprecedented opportunity for academic groups, from regions without a long tradition in high-energy physics studies, to expand their research in the area of particle physics and related topics. This poster summarizes the experience of...
Almost half a century after it was predicted, the LHC delivered the Higgs boson in spectacular style. Over the next 15-20 years, the machine and its luminosity upgrade will continue to enable ATLAS and CMS to make great strides in understanding the Higgs-boson’s properties. But to fully explore the scalar sector and its possible connections with the SM’s most mysterious features, and thus to...
The CMS experiment has a broad physics program that includes precision measurements on standard model physics and searches for new physics that could explain some of the open conundrums in particle physics today. The talk will cover some of the latest results from CMS, including Higgs, Supersymmetry, dark matter, heavy resonances, Leptoquarks, among others, using data collected at the LHC...
The ATLAS experiment at the Large Hadron Collider (LHC) at CERN is a general-purpose detector designed to exploit the full discovery potential of the LHC. It is composed of a tracking detector in the innermost region around the interaction point, surrounded by calorimeters and muon chambers, featuring full 4π coverage to measure precisely the energies, directions and identity of all the...
To what extent are all astrophysical, dark, compact objects both black holes (BHs) and described by the Kerr geometry? We embark on the exercise of defying the universality of this remarkable idea, often called the "Kerr hypothesis". After establishing its rationale and timeliness, we define a minimal set of reasonability criteria for alternative models of dark compact objects. Then, as proof...
I will present the cosmological results from the Dark Energy Survey (DES) analysis of data collected over three years, the so-called DES-Y3 data, focusing on the contributions from our group. These results arise from studying three combinations of two-point angular correlation functions (the so-called 3x2pt analysis) involving the distribution of galaxies and the distortions in their images...
This talk shows a general procedure to construct hairy rotating black holes by deforming a spherically symmetric solution following the Gravitational Decoupling approach. We demonstrate that, in comparison with the well-known Newman-Janis algorithm (with and without complexification), the application of our protocol is straightforward. We provide a particular example of a solution that reduces...
In the Standard Model, the ground state of the Higgs field is not found at zero but instead corresponds to one of the degenerate solutions minimising the Higgs potential. In turn, this spontaneous electroweak symmetry breaking provides a mechanism for the mass generation of nearly all fundamental particles. The Standard Model makes a definite prediction for the Higgs boson self-coupling and...
Very detailed measurements of Higgs boson properties can be performed with the Run 2 13 TeV pp collision dataset collected by the ATLAS experiment. This talk presents a review of the latest measurements of the Higgs boson properties, including its mass, CP, differential cross-sections . Furthermore, couplings combining measurements targeting various production modes and decay channels are...
One of the most used strategies to model compact objects is considering equations of state that outline the most important physical processes among their thermodynamic variables. Perturbation analysis of its physical variables allows discerning between stable and unstable configurations, providing models that could describe observed objects.
In this work, we studied the physical...
The most recent measurements and searches for the Higgs boson decaying into a pair of bottom or charm quarks by the CMS Collaboration will be presented. The results are obtained using the entire Run 2 LHC data collected in proton-proton collisions at a center of mass energy of 13 TeV, targeting the associated production of the Higgs boson with a Vector boson (W or Z boson) and the gluon fusion...
Ultracompact stars or “gravastars” were modeled firstly by Mazur and Mottola (MM) by the use of the Schwarzschild interior solution in a special case. Recently, the MM model has been extended to anisotropic domains by the Gravitational Decoupling (GD) through the Minimal Geometric Deformation (MGD) approach. In contrast to the original solution, the resulting configuration can be matched...
Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. This talk will present the latest results from SUSY searches conducted by the ATLAS experiment. The searches target multiple final states and different assumptions about the decay mode of the produced SUSY particles,...
Ideas originally developed for axion dark matter can be adopted to search for high-frequency gravitational waves. To illustrate this, I will discuss the Gertsenshtein effect, or the inter-conversion of gravitational waves into electromagnetic waves in the presence of external magnetic (or electric) fields. Exploiting the analogy with axions I will show that axion haloscopes based on...
We consider a simplified model where a W' boson is added to the standard model with negligible couplings to quarks, but generic couplings to leptons and electroweak bosons. We study the implications of such a model for LHC searches. Consequently, we propose an LHC search through the vector boson fusion topology which would have sensitivity for such a new particle with the current proton-proton...
I will review the latest hadronization studies in the strange and charm sector based on LHC/RHIC rare particle production measurements. I will show a new approach that might link an initially entangled parton state to final state hadron multiplicities. This initial state can also serve as a seemingly thermalized system to explain the necessary basis for the hydrodynamical evolution of...
The study of Emergent Universe models (EU) is based on the assumption that the universe emerges from a past eternal Einstein static state (ES) towards an inflationary phase. The EU is an attractive scenario since it avoids the initial singularity and provides a smooth transition towards an inflationary period.
In this context, it has been pointed out by Mithani-Vilenkin that certain...
Certain anomalies observed in the angular correlation spectra of electron/positron pairs produced in nuclear transitions of 8Be, 4He and 12C can be interpreted as the emission of a bosonic particle with a mass of 17 MeV, that promptly decays into e+e−. I review the current status of these anomalies and the theoretical interpretation for...
CERN's Large Hadron Collider has just started Run 3 of data collection. And in 2029 it will commence the High-Luminosity (HL-LHC) phase of running - expected to last almost a decade. The amount of data collected during the HL-LHC is unprecedented in High Energy Physics. Collecting, processing, calibrating and analyzing that volume of data to the precision required is forcing the community to...
One of the main goals of the ALICE (A Large Ion Collider Experiment) collaboration is the precise study of the properties of the so-called quark–gluon plasma (QGP), the state of deconfined nuclear matter produced in heavy-ions collisions at relativistic energies. The ALICE experiment design was optimized to study this kind of collision with detectors able to identify hadrons, leptons and...
Understanding the properties of nuclear matter and its emergence through the underlying partonic structure and dynamics of quarks and gluons requires a new experimental facility in hadronic physics known as the Electron-Ion Collider (EIC). The EIC will address some of the most profound questions concerning the emergence of nuclear properties by precisely imaging gluons and quarks inside...
