Banca de DEFESA: LUCAS OLIVEIRA QUINTINO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : LUCAS OLIVEIRA QUINTINO
DATE: 15/05/2023
TIME: 14:00
LOCAL: Remoto: Conferência Web
TITLE:

Analyzing the time spectrum of supernova neutrinos to constrain their effective mass or Lorentz Invariance Violation

PAGES: 210
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUBÁREA: Física das Partículas Elementares e Campos
SPECIALTY: Propriedades de Partículas Específicas e Ressonâncias
SUMMARY:

We analyze the expected arrival time spectrum of supernova neutrinos using simulated
luminosity and computing the expected number of events in future detectors such as the DUNE Far
Detector and Hyper-Kamiokande. We develop a general method using minimum square statistics that can compute the sensitivity to any variable affecting neutrino time of flight. We apply this method in two different situations: First, we compare the time spectrum changes due to different neutrino mass values to put limits in electron (anti)neutrino effective mass. Second, we constrain Lorentz Invariance Violation through the mass scale, M QG , at which it would occur. We consider two main neutrino detection techniques: 1. DUNE-like liquid argon TPC, for which the main detection channel is ν_e + ^40 Ar → e − + ^40 K^∗ , related to the supernova neutronization burst, and 2. HyperK-like water Cherenkov detector, for which ν̄ _e + p → e + + n is the main detection channel. We consider a fixed supernova distance of 10 kpc and two different masses of the progenitor star: (i) 15 M with neutrino emission time up to 0.3 s and (ii) 11.2 M with neutrino emission time up to 10 s. The best mass limits at 3σ are of O( 1 ) eV. For ν_e , the best limit comes from a DUNE-like detector if the mass ordering happens to be inverted. For ν̄ _e , the best limit comes from a HyperK-like detector. The best limit for the Lorentz Invariance Violation mass scale at 3σ level, considering superluminal or subluminal effect, is M_QG & 1e13 GeV (M_QG & 5 × 1e5 GeV) for linear (quadratic) energy dependence.

COMMITTEE MEMBERS:
Presidente - Interno ao Programa - 1770888 - CELIO ADREGA DE MOURA JUNIOR
Membro Titular - Examinador(a) Interno ao Programa - 1780373 - LAURA PAULUCCI MARINHO
Membro Titular - Examinador(a) Interno ao Programa - 2211564 - ANDRE PANIAGO LESSA
Membro Titular - Examinador(a) Externo à Instituição - RODOLFO VALENTIM DA COSTA LIMA - UNIFESP
Membro Titular - Examinador(a) Externo à Instituição - PEDRO CUNHA DE HOLANDA - UNICAMP
Membro Suplente - Examinador(a) Interno ao Programa - 1545176 - MARCELO AUGUSTO LEIGUI DE OLIVEIRA
Membro Suplente - Examinador(a) Interno ao Programa - 2616823 - ALYSSON FABIO FERRARI
Membro Suplente - Examinador(a) Externo à Instituição - MARCO ANDRÉ FERREIRA DIAS - UNIFESP
Membro Suplente - Examinador(a) Externo à Instituição - ANDRE FABIANO STEKLAIN LISBOA - UTFPR