Long baseline neutrino physics with a muon storage ring neutrino source - art. no. 053004

We examine the physics capabilities of known flavor neutrino beams from int ense muon sources. We find that long-baseline neutrino experiments based on such beams can provide precise measurements of neutrino oscillation mass a nd mixing parameters. Furthermore, they can test whether the dominant atmos pheric neutrino oscillations are nu(mu) --> nu(tau) and/or nu(mu) --> nu(s) , determine the nu(mu) --> nu(e) content of atmospheric neutrino oscillatio ns, and measure nu(e) --> nu(tau) appearance. Depending on the oscillation parameters, they may be able to detect Earth matter and CP violation effect s and to determine the ordering of some of the mass eigenstates.