The coincidence between baryon and dark energy densities can be quite naturally accommodated if there exists an inexact copy of the Standard Model, the mirror world. We will discuss some of these realizations.
We present an experimental search of Supersymmetry motivated by electrowikinos production in the electro-weak sector using the CMS experiment at $\sqrt{s}=13$ TeV. Data comes from proton-proton (pp) collisions corresponding to 35.9 and 41.3 $fb^{-1}$ collected during 2016 and 2017 respectively. We focus in final states containing a hadronic tau ($\tau_{h}$) of low transverse momentum...
Constraints on the interactions between the Dark Matter (DM) sector and the Standard Model (SM) sector can be established at the LHC. We study possible top quark spin correlation effects on the interactions between DM and top quarks mediated by the exchange of spin-0 and spin-1 particles. We discuss in detail the results of angular correlations and distributions of the top quark which may...
Dark matter that is electrically neutral but couples to the electromagnetic current through higherdimensional
operators constitutes an interesting class of models. We investigate this class of models
at the Large Hadron Collider, focusing on the anapole moment operator in an effective field theory
(EFT) framework, and utilizing the vector boson fusion (VBF) topology. Assuming...
A search for supersymmetric particles produced in the vector boson fusion topology in proton-proton collisions is presented. The search targets final states with one or zero leptons, large missing transverse momentum, and two jets with a large separation in rapidity. The data sample corresponds to an integrated luminosity of 35.9 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}= 13$ TeV...
Searching for DM and HNL with the ATLAS detector
We present shape measurements of Milky Way-sized dark matter halos at redshift $z=0$ in a suite of 30 zoom simulations from the Auriga project. We compare the results in full magnetohydrodynamics against dark matter only simulations and find a strong influence of baryons in making dark matter haloes rounder at all radii compared to their dark matter only counterparts. At distances $\sim 30$...
La búsqueda de la materia oscura es una empresa conjunta entre la física de partículas y la astrofísica. A partir de evidencia astrofísica sabemos que la partícula de materia oscura debe estar por fuera del modelo estándar.
No obstante, tal partícula debe tener propiedades de partícula bien definidas, incluyendo su sección eficaz. Esto significa que la materia oscura debe ser en algún grado...
Presentaré algunos de los problemas abiertos mas importantes en el area de fenomenologia de la materia oscura y unas cuantas ideas recientes sobre como afrontarlos.
We examine an extension of the Standard Model that addresses the dark matter puzzle and generates Dirac neutrinos masses through the radiative seesaw mechanism.
The new field content includes a scalar field that plays an important role in setting the relic abundance of dark matter.
We analyze the phenomenology in the light of direct, indirect, and collider searches of dark matter.
In this...
Once dark matter has been discovered and its particle physics properties have been determined, a crucial question rises concerning how it was produced in the early Universe. If its thermally averaged annihilation cross section is in the ballpark of few×$10^{-26}$ cm3/s, the WIMP mechanism in the standard cosmological scenario (i.e. radiation dominated Universe) will be highly favored. If this...
Multicomponent dark matter models are an interesting solution to the challenges that simplified models face under current experimental constraints. The relic abundance is saturated due to the interplay of two or more dark matter candidates that may or may not affect each others relic density. One interesting possibility arises when the two dark matter candidates are part of the inert doublet...
We have used a VLT-VIMOS data-set and analyzed VLT-MUSE data on the inner core of a galaxy cluster, obtaining spectra and measuring with high precision redshifts of cluster members, which were used to make an ATLAS of the galaxy population diversity that will be useful in further studies. We also used this spectroscopic information to classify the galaxy population as a function of the radio...
We discuss a version of the Natural Inflation model in which the inflaton field is an axion (pseudoscalar) field coupled to a U(1) gauge fields through an axial coupling $\phi \tilde{F} F$ and to the gravitational field through the kinetic coupling term $G_{\mu \nu} \partial_{\mu}\phi \partial_{\nu}\phi$. The couplings mentioned before are compatible with the shift symmetry $\phi \rightarrow...
Inspired in the Standard Model of Elementary Particles, the Einstein Yang-Mills Higgs action with the Higgs field in the SU(2) representation was proposed in Class. Quantum Grav. 32 (2015) 045002 as the element responsible for the dark energy phenomenon. We revisit this action emphasizing in a very important aspect not sufficiently explored in the original work and that substantially changes...
The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has...
In order to analyze some low energy experimental anomalies, we charge with a non-universal U(1)0 gauge symmetry the standard model fermions, taking as a starting point the well-known scotogenic model. In order to have non-trivial solutions to the anomalies and the Yukawa constraints, we add three neutral singlet Dirac fermions. We have found two possible nonuniversal solutions which, as a...
