Astrophysical Neutrinos
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Neutrinos astrofísicos : mecanismo de produção e razão entre sabores / Astrophysical neutrinos : production mechanism and flavor radio
Neutrinos Astrofísicos são produzidos quando prótons ou núcleos, acelerados numa fonte astrofísica, interagem com a matéria nas imediações gerando méons que decaem fracamente produzindo neutrinos. Remanescentes de Supernovas, Núcleos Ativos de Galáxias (AGN) e Explosões de Raios Gama (GRB) são alguns dos candidatos a fontes, e a detecção desse
Publicado em: 2011
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2. A mistura dos bósons Z − Z′ e a quebra explícita da simetria leptônica no modelo 331 com neutrinos de mao direita
In this thesis, we develop some phenomenological aspects of a model based on the gauge symmetry SU(3)CNSU(3)LNU(1)N (311νR), that include righthanded neurinos in its matter content. We establish all the necessary structure for the study of the phenomenological aspects of the model. First, we obtain bounds on the angle that mix the gauge bosons Z and Z
Publicado em: 2009
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3. Spin flavor oscillation of neutrinos in rotating gravitational fields and their effects on pulsar kicks
The origin of high velocities of pulsars is studied by considering the spin-flip conversion of neutrinos propagating in a gravitational field of a protoneutron star. For a rotating gravitational source (such as pulsars) with angular velocity , one finds that the spin connections (entering in the Dirac equation written in curved space time) induce an addition
Brazilian Journal of Physics. Publicado em: 2005-06
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4. Neutrino physics and astrophysics with the MACRO experiment at the Gran Sasso lab
The results of the MACRO experiment on atmospheric neutrino oscillations are presented and discussed. The data concern different event topologies with average neutrino energies of ~ 4 and ~50 GeV. The Multiple Coulomb Scattering of muons in the MACRO absorbers was used to estimate the neutrino energy of each event of the higher energy sample. The angular dis
Brazilian Journal of Physics. Publicado em: 2003-06