6 research outputs found

    Effects of the violation of the equivalence principle at DUNE

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    A number of di erent e ects of the violation of the Equivalence Principle (VEP), taken as sub-leading mechanism of neutrino avor oscillation, are examined within the framework of the DUNE experiment. We study the possibility of obtaining a misleading neutrino oscillation parameter region caused by our unawareness of VEP. Additionally, we evaluate the impact on the measurement of CP violation and the distinction of neutrino mass hierarchy at DUNE. Besides, limits on VEP for a wide variety of textures of the matrix that connects neutrino gravity eigenstates to avor eigenstates are imposed. An extra-task of our study is to set limits on Hamiltonian added terms considering di erent energy dependencies (En, with n = 0; 1; 2; 3) that can be associated to the usual Lorentz violating terms de ned in the Standard Model Extension Hamiltonian. In order to understand our results, approximated analytical three neutrino oscillation probability formulae are derived.Trabajo de investigació

    Exploring the dark sectors via the cooling of white dwarfs

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    As dense and hot bodies with a well-understood equation of state, white dwarfs offer a unique opportunity to investigate new physics. In this paper, we examine the role of dark sectors, which are extensions of the Standard Model of particle physics that are not directly observable, in the cooling process of white dwarfs. Specifically, we examine the role of a dark photon, within the framework of a three-portal Model, in enhancing the neutrino emission during the cooling process of white dwarfs. We compare this scenario to the energy release predicted by the Standard Model. By analyzing the parameter space of dark sectors, our study aims to identify regions that could lead to significant deviations from the expected energy release of white dwarfs.Comment: 9 pages, 5 figure

    A panorama of new-physics explanations to the MiniBooNE excess

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    The MiniBooNE low-energy excess stands as an unexplained anomaly in short-baseline neutrino oscillation experiments. It has been shown that it can be explained in the context of dark sector models. Here, we provide an overview of the possible new-physics solutions based on electron, photon, and dilepton final states. We systematically discuss the various production mechanisms for dark particles in neutrino-nucleus scattering. Our main result is a comprehensive fit to the MiniBooNE energy spectrum in the parameter space of dark neutrino models, where short-lived heavy neutral leptons are produced in neutrino interactions and decay to e+e−e^+e^- pairs inside the detector. For the first time, other experiments will be able to directly confirm or rule out dark neutrino interpretations of the MiniBooNE low-energy excess.Comment: 35 pages, 21 figure

    DarkNews: a Python-based event generator for heavy neutral lepton production in neutrino-nucleus scattering

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    We introduce DarkNews, a lightweight Python-based Monte-Carlo generator for beyond-the-Standard-Model neutrino-nucleus scattering. The generator handles the production and decay of heavy neutral leptons via additional vector or scalar mediators, as well as through transition magnetic moments. DarkNews samples pre-computed neutrino-nucleus upscattering cross sections and heavy neutrino decay rates to produce dilepton and single-photon events in accelerator neutrino experiments. We present two case studies with differential distributions for models that can explain the MiniBooNE excess. The aim of this code is to aid the neutrino theory and experimental communities in performing searches and sensitivity studies for new particles produced in neutrino upscattering.Comment: 18 pages, 6 tables, 8 figure

    Third EuCAPT Annual Symposium

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    The aim of this presentation is to introduce a dark extension of the SM that communicates to it through three portals: neutrino, vector and scalar mixing, by which it could be possible to explain the Low Energy Excess (LEE) at MiniBooNE. In the model, Heavy Neutral leptons are produced by upscattering via a dark photon, with masses around 10 MeV – 2 GeV, and subsequently decay into an electron-positron pair and neutrinos. If sufficiently collimated or asymmetric in energy, these events can be detected as a single shower and explain the MiniBooNE LEE. We show how the model can well reconstruct the energy spectrum. We consider two cases: 3 ν + 1 HNL and 3 ν + 2 HNLs

    Lenguaje y mente: la factibilidad del monismo anómalo de Donald Davidson

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    La presente tesis busca defender la factibilidad de la propuesta de Donald Davidson conocida como ‘Monismo Anómalo’. Esta fue planteada como respuesta a la pregunta por la naturaleza de la relación entre los eventos físicos y los mentales. Su planteamiento nuclear consiste en la afirmación de un monismo ontológico de eventos, mas un dualismo conceptual irreducible de lo físico y lo mental. Las premisas del Monismo Anómalo entran en aparente tensión. La tesis que se defenderá a continuación plantea una interpretación lingüística de la propuesta de Davidson en orden a articular las premisas y comprender los planteamientos. Con ello, se podrá responder a los principales cuestionamientos a los planteamientos de Davidson.The present thesis pretends to defend the rational viability of Donald Davidson’s ‘Anomalous Monism’. This was suggested as an answer to the inquiry about the nature of the relation between physical and mental events. Its core content consists in stating an ontological monism of events, while defending an irreducible conceptual dualism between the physical and mental realms. The premises Davidson considers for Anomalous Monism exhibit an apparent conflict. This thesis defends a linguistic interpretation of Davidson’s work in order to soften that tension and really comprehend Anomalous Monism. By developing those ideas, it could be possible to give face to Davidson’s critics