2003/08/11 by M. Garbutt, Matthew Garbutt, Garbutt, Matthew +2 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0308111
21 pages, 5 figures
arxiv created 2003/08/11 · arxiv updated 2009/12/01
In this note we investigate the impact of new physics in the form of general four-fermion interactions on neutrino oscillation signals. We develop a field theoretic description of the overall oscillation process which includes the non-standard interactions during the neutrino production, propagation and detection stages. Insights gained during the development of this formalism regarding the possibility of new interactions mimicking neutrino mass differences are expounded. The impact of possible new physics is assessed by studying the νμ→ντ oscillation channel in vacuum and the νe→ νμ channel in matter. Although it is known that the effects of new interactions can only act as a perturbation to the leading oscillation parameters, we find that great care needs to be taken when drawing conclusions regarding the strength of new couplings from oscillation measurements.