Light Sterile Neutrinos and Short Baseline Neutrino Oscillation Anomalies

作者: JiJi Fan , Paul Langacker

DOI: 10.1007/JHEP04(2012)083

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摘要: We study two possible explanations for short baseline neutrino oscillation anomalies, such as the LSND and MiniBooNE anti-neutrino data, reactor anomaly. The first scenario is mini-seesaw mechanism with eV-scale sterile neutrinos. present both analytic formulas numerical results showing that this could account anomalies consistent observed masses mixings of three active also show arise naturally from an effective theory containing a TeV-scale VEV, which be related to other physics. minimal version relates active-sterile five real parameters favors inverted hierarchy. It has interesting property Majorana mass neutrinoless double beta decay vanishes, while relevant tritium cosmology are respectively around 0.2 2.4 eV. second contains only one but non-unitary mixing matrix between light find though may explain if non-unitarity originates heavy large (fine-tuned) angle, highly constrained by cosmological laboratory observations.

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