Which long-baseline neutrino experiments are preferable?

摘要: We discuss the physics of superbeam upgrades, where we focus on T2KK, a NuMI beam line based experiment NO\ensuremath{\nu}A*, and wide-band (WBB) independent line. For find that Japan-Korea baseline helps resolve parameter degeneracies, but improvement due to correlated systematics between two detectors (using identical detectors) is only moderate. an upgrade NO\ensuremath{\nu}A with liquid argon detector, demonstrate Ash River site preferred compared alternatives, such as at second oscillation maximum, optimal within U.S. WBB experiment, high proton energies long decay tunnels are preferable. compare water Cherenkov technologies, break-even point in detector cost about $4\ensuremath{\mathbin:}1$. In order potential different experimental configurations, use concept exposure normalize performance. experiments WBBs best concept. NO\ensuremath{\nu}A* could be competitive sufficient luminosity. If ${sin}^{2}2{\ensuremath{\theta}}_{13}g0.01$, can perform better than neutrino factory.