Conveners
Parallel session A
- Melissa Maria Cruz Torres (CBPF - Brazilian Center for Physics Research (BR))
Parallel session A
- Eduardo Rojas
Parallel session A
- José Bazo
Parallel session A
- Santiago Rafael Paredes Saenz (Universite Libre de Bruxelles (BE))
Parallel session A
- Alejandro Gomez Espinosa (ETH Zurich (CH))
Description
Shorter talks for accepted abstracts
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...
The triplet vector boson (TVB) is a simplified new physics model involving massive vector bosons transforming as a weak triplet vector, which it has been proposed as a combined explanation to the anomalous $b \to s\mu^+\mu^-$ and $b \to c \tau\bar{\nu}_\tau$ data (the so-called $B$ meson anomalies). In this work, we carry out an updated view of the TVB model, including the Belle II...
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...
Many theories beyond the Standard Model (BSM) have been proposed to address several of the Standard Model shortcomings, such as the origin of dark matter and neutrino masses, the fine-tuning of the Higgs boson mass, or the observed pattern of masses and mixing angles in the quark and lepton sectors. Many of these BSM extensions predict new particles or interactions directly accessible at the...
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 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 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...
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...
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...
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...
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...
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...
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...
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,...
The discovery of the Higgs boson with the mass of 125 GeV confirmed the mass generation mechanism via spontaneous electroweak symmetry breaking and completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many experimental measurements, it is not capable of solely explaining some observations. Many extensions of the Standard...
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...
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...
