ausblenden:
Schlagwörter:
High Energy Physics - Phenomenology, hep-ph
Zusammenfassung:
Sterile neutrino models with new gauge interactions in the sterile sector are
phenomenologically interesting since they can lead to novel effects in neutrino
oscillation experiments, in cosmology and in dark matter detectors, possibly
even explaining some of the observed anomalies in these experiments. Here, we
use data from neutrino oscillation experiments, in particular from MiniBooNE,
MINOS and solar neutrino experiments, to constrain such models. We focus in
particular on the case where the sterile sector gauge boson $A'$ couples also
to Standard Model particles (for instance to the baryon number current) and
thus induces a large Mikheyev-Smirnov-Wolfenstein potential. For eV-scale
sterile neutrinos, we obtain strong constraints especially from MINOS, which
restricts the strength of the new interaction to be less than $\sim 10$ times
that of the Standard Model weak interaction unless active-sterile neutrino
mixing is very small ($\sin^2 \theta_{24} \lesssim 10^{-3}$). This rules out
gauge forces large enough to affect short baseline experiments like MiniBooNE
and it imposes nontrivial constraints on signals from sterile neutrino
scattering in dark matter experiments.
