Neutrino Flavor Ratio on Earth and at Astrophysical Sources

Abstract

We present the reconstruction of neutrino flavor ratios at astrophysical sources. For distinguishing the pion source and the muon-damped source to the 3$\ddot{I}ƒ$ level, the neutrino flux ratios, $R\equiv \ddot{I}•(\hat{I}{½}_{\hat{I}}¼)/(\ddot{I}•(\hat{I}{½}_e)+\ddot{I}•(\hat{I}{½}_{\ddot{I}}„))$ and $S\equiv \ddot{I}•(\hat{I}{½}_e)/\ddot{I}•(\hat{I}{½}_{\ddot{I}}„)$, need to be measured in accuracies better than 10%.

3 pages, 8 figures. Talk presented by T.C. Liu in ERICE 2009, Sicily.