We propose a simple phenomenological model predicting, through Lorentz symmetry breaking, a CPT-violating asymmetry between particle and antiparticle states in neutrino oscillations involving sterile neutrinos. Such a model is able to explain the apparently observed anomalous excess of low-energy upsilon(e-)like events, reported by the MiniBooNE collaboration, as well as the non-observation of the corresponding anomalous excess of upsilon(e-)like events. The present model leads to very specific physical predictions in the neutrino oscillations scenario, and account for the observed anomalies in terms of only one CPT-Lorentz violation parameter of the order of the Grand-Unification energy scale.
CPT-VIOLATING NEUTRINO OSCILLATIONS / Esposito, S; Salesi, G. - In: MODERN PHYSICS LETTERS A. - ISSN 0217-7323. - 25:8(2010), pp. 597-606. [10.1142/S0217732310032640]
CPT-VIOLATING NEUTRINO OSCILLATIONS
Esposito S;
2010
Abstract
We propose a simple phenomenological model predicting, through Lorentz symmetry breaking, a CPT-violating asymmetry between particle and antiparticle states in neutrino oscillations involving sterile neutrinos. Such a model is able to explain the apparently observed anomalous excess of low-energy upsilon(e-)like events, reported by the MiniBooNE collaboration, as well as the non-observation of the corresponding anomalous excess of upsilon(e-)like events. The present model leads to very specific physical predictions in the neutrino oscillations scenario, and account for the observed anomalies in terms of only one CPT-Lorentz violation parameter of the order of the Grand-Unification energy scale.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
