| Escuela de FÃsica de Altas EnergÃas |
|
There are no translations available. Jueves 14 de enero, 2010 – 15:30 hrs. Sala de Conferencias Dr. Luciano Laroze (E-300) Jorge S. Diaz
Indiana University Lorentz and CPT violation: theory and experimental tests using neutrino oscillations Abstract: Lorentz symmetry is one of the basic features of our best existing theories. This symmetry can be tested using neutrino oscillations, whose interferometric nature makes them sensitive probes for new physics. The Standard-Model Extension (SME) is an effective field theory that, besides the Standard Model and General Relativity, contains all possible operators that break Lorentz symmetry. A subset of operators also breaks CPT symmetry. This talk describes the neutrino sector of the SME and the key experimental signatures arising from the breakdown of Lorentz symmetry. A simple model based on the SME is presented, which is consistent with all the standard observed features, accommodates the puzzling LSND signal, and predicts a lowenergy excess of the type discovered by MiniBooNE. The perturbative study of neutrino oscillations is also reviewed including the application of this description to several existing and future long-baseline experiments. Sensitivities are estimated to be consistent with the Planck-scale suppression expected for these departures from exact symmetry. Entrada Liberada
|