Giovani Dalla Valle Garcia

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Projetos de pesquisa

• 2021 - 2021

  Compactification of Chiral Two-form Fields, Descrição: A new manifestly Lorentz-invariant action principle for chiral elds, proposed by Ashoke Sen,has been thoroughly studied. The new action is applied in the analysis of chiral 2-form eldsin compactied six-dimensional geometries and, then, in ve-dimensional reduced spaces. Forthe free chiral eld, the Kaluza-Klein reduced theory features an action describing two freenon-chiral elds in 5 dimensions without any additional assumptions, a free vector eld and afree 2-form eld; the latter being the additional eld required for a manifestly Lorentz-invariantformulation. In contrast, the usual formalism of chiral elds requires an assumption for itsdimensional reduction and does not generate an action principle, only equations of motion.Nevertheless, both formulations are shown to be equivalent, up to addition of free elds, at theclassical level. At last, the compactied chiral free eld has been coupled to a dilaton metric andthe resulting action is shown to exhibit a similar structure to the compactied chiral free eld.In this case, the dilaton couples to all elds of the theory and, as a consequence, the additionalfree eld does not explicitly appears. https://www.academia.edu/50767170/Compactification_of_Chiral_Two_form_Fields_Laboratoire_de_Physique_%C3%89cole_normale_sup%C3%A9rieure_de_Lyon. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Mestrado acadêmico: (1) . , Integrantes: Giovani Dalla Valle Garcia - Integrante / Henning Samtleben - Coordenador / Stefan Hohenegger - Integrante., Financiador(es): École Normale Supérieure de Lyon - Remuneração.

• 2020 - 2020

  Calculation of cosmic-ray muon spallation backgrounds with Geant4 for Supernova Relic Neutrino signals in Super-Kamiokande, Descrição: A simulation for the study of cosmic-ray muon spallation backgrounds in the Super-Kamiokande water Cherenkov detector was developed with the help of the Geant4 toolkit. The simulation was validated against results from a 2014 article of S. W. Li and J. F. Beacom . Though, the validation showed an overall agreement, discrepancies were found in the isotopes yield predictions and in the neutrons behavior. These two facts are linked, as neutrons are the most important particles for isotopes production. A nal work was carried out to study the dierent results from dierent choices of physics list and from simplications on the initial muons conditions. The isotopes yields also show signicant variations in the case of the dierent physics lists comparison. In particular, these deviations can be used to evaluate systematic error coming from the physics models used in the simulation. Finally, the simplications did not have serious implications in the general physics results, only 7 large dierences, out of 59 isotopes, were found for the yield predictions. These dierences are for very rare events, which still have signicant statistical uctuations for the numbers of events simulated. https://www.academia.edu/44456013/Calculation_of_cosmic_ray_muon_spallation_backgrounds_with_Geant4_for_Supernova_Relic_Neutrino_signals_in_Super_Kamiokande_Laboratoire_Leprince_Ringuet_%C3%89cole_polytechnique?source=swp_share. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Mestrado acadêmico: (1) . , Integrantes: Giovani Dalla Valle Garcia - Integrante / Thomas Mueller - Coordenador., Financiador(es): Laboratoire Leprince-Ringuet - Remuneração.

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