Authors: Sanjib K Agarwalla Patrick Huber Jian Tang Walter Winter
Publish Date: 2011/01/25
Volume: 2011, Issue: 1, Pages: 120-
Abstract
We perform the baseline and energy optimization of the Neutrino Factory including the latest simulation results on the magnetized iron detector MIND We also consider the impact of τ decays generated by νμ → ντ or ν e → ντ appearance on the mass hierarchy CP violation and θ 13 discovery reaches which we find to be negligible for the considered detector For the baselineenergy optimization for small sin2 2θ 13 we qualitatively recover the results with earlier simulations of the MIND detector We find optimal baselines of about 2500km to 5000km for the CP violation measurement where now values of E μ as low as about 12 GeV may be possible However for large sin2 2θ 13 we demonstrate that the lower threshold and the backgrounds reconstructed at lower energies allow in fact for muon energies as low as 5 GeV at considerably shorter baselines such as FNALHomestake This implies that with the latest MIND analysis lowand highenergy versions of the Neutrino Factory are just two different versions of the same experiment optimized for different parts of the parameter space Apart from a greenfield study of the updated detector performance we discuss specific implementations for the twobaseline Neutrino Factory where the considered detector sites are taken to be currently discussed underground laboratories We find that reasonable setups can be found for the Neutrino Factory source in Asia Europe and North America and that a triangularshaped storage ring is possible in all cases based on geometrical arguments only
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