2540 km: bimagic baseline for neutrino oscillation parameters.

摘要: We show that a source-to-detector distance of 2540 km, motivated recently [S. K. Raut, R. S. Singh, and U. Sankar, arXiv:0908.3741] for narrow band superbeam, offers multiple advantages low energy neutrino factory with detector can identify muon charge. At this baseline, any hierarchy, the wrong-sign signal is almost independent $CP$ violation ${\ensuremath{\theta}}_{13}$ in certain ranges. This allows identification hierarchy clean way. In addition, part spectrum also sensitive to violating phase ${\ensuremath{\theta}}_{13}$, so same setup be used probe these parameters as well.