Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 21: Neutrinophysik (Theorie) 2

T 21.2: Vortrag

Freitag, 13. März 2009, 14:15–14:30, M109

Large gauge-invariant non-standard neutrino interaction — •Toshihiko Ota¹, Belen Gavela², Daniel Hernandez², and Walter Winter¹ — ¹Institut fuer Theoretische Physik und Astrophysik, Universitaet Wuerzburg, Wuerzburg, Germany — ²Departamento de Fisica Teorica and Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, Madrid, Spain

We discuss possible models for non-standard neutrino interactions by decomposing all possible dimension six and eight effective operators by their tree-level mediators. Taking into account the constraints from four charged lepton interactions, electroweak precision data, lepton universality, and the non-unitarity of the lepton mixing matrix, we find that large non-standard neutrino interactions from dimension eight operators are phenomenologically allowed in all flavour channels, and show that at least two new mediator particles and some cancellation conditions are required.