Solar neutrino detection in a large volume double-phase liquid argon experiment
Permanent link to this recordhttp://hdl.handle.net/20.500.12613/5702
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Abstract© 2016 IOP Publishing Ltd and Sissa Medialab srl . Precision measurements of solar neutrinos emitted by specific nuclear reaction chains in the Sun are of great interest for developing an improved understanding of star formation and evolution. Given the expected neutrino fluxes and known detection reactions, such measurements require detectors capable of collecting neutrino-electron scattering data in exposures on the order of 1 ktonne-yr, with good energy resolution and extremely low background. Two-phase liquid argon time projection chambers (LAr TPCs) are under development for direct Dark Matter WIMP searches, which possess very large sensitive mass, high scintillation light yield, good energy resolution, and good spatial resolution in all three cartesian directions. While enabling Dark Matter searches with sensitivity extending to the ''neutrino floor'' (given by the rate of nuclear recoil events from solar neutrino coherent scattering), such detectors could also enable precision measurements of solar neutrino fluxes using the neutrino-electron elastic scattering events. Modeling results are presented for the cosmogenic and radiogenic backgrounds affecting solar neutrino detection in a 300 tonne (100 tonne fiducial) LAr TPC operating at LNGS depth (3,800 meters of water equivalent). The results show that such a detector could measure the CNO neutrino rate with ∼15% precision, and significantly improve the precision of the 7Be and pep neutrino rates compared to the currently available results from the Borexino organic liquid scintillator detector.
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Has partJournal of Cosmology and Astroparticle Physics
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Theia: an advanced optical neutrino detectorAskins, 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.
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