• Theia: an advanced optical neutrino detector

      Askins, M; Bagdasarian, Z; Barros, N; Beier, EW; Blucher, E; Bonventre, R; Bourret, E; Callaghan, EJ; Caravaca, J; Diwan, M; Dye, ST; Eisch, J; Elagin, A; Enqvist, T; Fischer, V; Frankiewicz, K; Grant, C; Guffanti, D; Hagner, C; Hallin, A; Jackson, CM; Jiang, R; Kaptanoglu, T; Klein, JR; Kolomensky, YG; Kraus, C; Krennrich, F; Kutter, T; Lachenmaier, T; Land, B; Lande, K; Learned, JG; Lozza, V; Ludhova, L; Malek, M; Manecki, S; Maneira, J; Maricic, J; Martyn, J; Mastbaum, A; Mauger, C; Moretti, F; Napolitano, J; Naranjo, B; Nieslony, M; Oberauer, L; Orebi Gann, GD; Ouellet, J; Pershing, T; Petcov, ST; Pickard, L; Rosero, R; Sanchez, MC; Sawatzki, J; Seo, SH; Smiley, M; Smy, M; Stahl, A; Steiger, H; Stock, MR; Sunej, H; Svoboda, R; Tiras, E; Trzaska, WH; Tzanov, M; Vagins, M; Vilela, C; Wang, Z; Wang, J; Wetstein, M; Wilking, MJ; Winslow, L; Wittich, P; Wonsak, B; Worcester, E; Wurm, M; Yang, G; Yeh, M; Zimmerman, ED; Zsoldos, S; Zuber, K (2020-05-01)
      © 2020, The Author(s). New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic photon sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov and scintillation signals. Such a detector could reconstruct particle direction and species using Cherenkov light while also having the excellent energy resolution and low threshold of a scintillator detector. Situated deep underground, and utilizing new techniques in computing and reconstruction, this detector could achieve unprecedented levels of background rejection, enabling a rich physics program spanning topics in nuclear, high-energy, and astrophysics, and across a dynamic range from hundreds of keV to many GeV. The scientific program would include observations of low- and high-energy solar neutrinos, determination of neutrino mass ordering and measurement of the neutrino CP-violating phase δ, observations of diffuse supernova neutrinos and neutrinos from a supernova burst, sensitive searches for nucleon decay and, ultimately, a search for neutrinoless double beta decay, with sensitivity reaching the normal ordering regime of neutrino mass phase space. This paper describes Theia, a detector design that incorporates these new technologies in a practical and affordable way to accomplish the science goals described above.