Sub-percent precision measurement of neutrino oscillation parameters with JUNO*

Medientyp: E-Artikel
Titel: Sub-percent precision measurement of neutrino oscillation parameters with JUNO*
Beteiligte: Abusleme, Angel; Adam, Thomas; Ahmad, Shakeel; Ahmed, Rizwan; Aiello, Sebastiano; Akram, Muhammad; Aleem, Abid; An, Fengpeng; An, Qi; Andronico, Giuseppe; Anfimov, Nikolay; Antonelli, Vito; Antoshkina, Tatiana; Asavapibhop, Burin; de André, João Pedro Athayde Marcondes; Auguste, Didier; Bai, Weidong; Balashov, Nikita; Baldini, Wander; Barresi, Andrea; Basilico, Davide; Baussan, Eric; Bellato, Marco; Bergnoli, Antonio; [...]
Erschienen: IOP Publishing, 2022
Erschienen in: Chinese Physics C
Sprache: Nicht zu entscheiden
DOI: 10.1088/1674-1137/ac8bc9
ISSN: 1674-1137; 2058-6132
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Beschreibung: <jats:title>Abstract</jats:title> <jats:p>JUNO is a multi-purpose neutrino observatory under construction in the south of China. This publication presents new sensitivity estimates for the measurement of the <jats:inline-formula> <jats:tex-math><?CDATA $ \Delta m^2_{31} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M2.jpg" xlink:type="simple" /> </jats:inline-formula>, <jats:inline-formula> <jats:tex-math><?CDATA $ \Delta m^2_{21} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M3.jpg" xlink:type="simple" /> </jats:inline-formula>, <jats:inline-formula> <jats:tex-math><?CDATA $ \sin^2 \theta_{12} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M4.jpg" xlink:type="simple" /> </jats:inline-formula>, and <jats:inline-formula> <jats:tex-math><?CDATA $ \sin^2 \theta_{13} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M5.jpg" xlink:type="simple" /> </jats:inline-formula> oscillation parameters using reactor antineutrinos, which is one of the primary physics goals of the experiment. The sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site, the nuclear reactors in the surrounding area and beyond, the detector response uncertainties, and the reactor antineutrino spectral shape constraints expected from the TAO satellite detector. It is found that the <jats:inline-formula> <jats:tex-math><?CDATA $ \Delta m^2_{21} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M6.jpg" xlink:type="simple" /> </jats:inline-formula> and <jats:inline-formula> <jats:tex-math><?CDATA $ \sin^2 \theta_{12} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M7.jpg" xlink:type="simple" /> </jats:inline-formula> oscillation parameters will be determined to 0.5% precision or better in six years of data collection. In the same period, the <jats:inline-formula> <jats:tex-math><?CDATA $ \Delta m^2_{31} $?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M8.jpg" xlink:type="simple" /> </jats:inline-formula> parameter will be determined to about <jats:inline-formula> <jats:tex-math><?CDATA $0.2$?></jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpc_46_12_123001_M9.jpg" xlink:type="simple" /> </jats:inline-formula>% precision for each mass ordering hypothesis. The new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.</jats:p>
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