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Master's Dissertation
DOI
https://doi.org/10.11606/D.43.2010.tde-20122010-152421
Document
Author
Full name
Leandro José Beraldo e Silva
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Albuquerque, Ivone Freire da Mota e (President)
Kemp, Ernesto
Sodre Junior, Laerte
Title in Portuguese
Sinais experimentais de matéria escura supermassiva e fortemente interagente
Keywords in Portuguese
astropartículas
extensões do modelo padrão de partículas
Matéria escura
raios cósmicos
telescópios de neutrinos.
Abstract in Portuguese
Há várias evidências experimentais da existência de matéria escura no universo. Apesar destas evidências, pouco se sabe sobre sua constituição, sabendo-se apenas que interage gravitacionalmente, mas não eletromagneticamente. Neste projeto, investigamos a possibilidade da matéria escura ser composta por partículas supermassivas e fortemente interagentes (Simpzillas). Para isto determinamos o sinal que deve ser deixado no telescópio IceCube por neutrinos resultantes de aniquilações de matéria escura no Sol. Após determinarmos o espectro de neutrinos no centro do Sol, simulamos sua propagação até a superfície, depois até a Terra e através da Terra até o detector. Comparamos então estes resultados com os fornecidos pelo IceCube. Esta comparação permite testar uma região do espaço de fase massa versus seção de choque previamente não-excluída por outros tipos de experiência que não telescópios de neutrinos. Como resultado, concluímos que partículas supermassivas e fortemente interagentes não podem constituir a matéria escura.
Title in English
Experimental signal of strongly interacting supermassive dark matter
Keywords in English
astroparticles
cosmic rays
dark matter
extensions of standard model of particles
neutrino telescopes.
Abstract in English
There are many experimental evidences for the existence of dark matter in the universe. Despite these evidences, there is no knowledge about its constitution other than the fact that it interacts gravitationally but not electromagnetically. In this project, we investigate the possibility that dark matter is composed of strongly interacting massive particles (Simpzillas). We determine the expected signal in the IceCube telescope from Simpzilla annihilation in the center of the Sun. We first determine the neutrino spectrum in the core of the Sun. We then simulate its propagation through both the Sun and Earth, and finally the rate of neutrinos at the detector. A comparison of these results to the ones published by the IceCube collaboration covers a large region of the yet not excluded regions of the mass versus cross-section phase space. As a result, the possibility of Simpzillas composing the dark matter is ruled out.
 
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disserta.pdf (7.96 Mbytes)
Publishing Date
2011-02-11
 
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