E-resources
Peer reviewed
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Ashtari Esfahani, A.; Böser, S.; Buzinsky, N.; Carmona-Benitez, M. C.; Claessens, C.; de Viveiros, L.; Doe, P. J.; Fertl, M.; Formaggio, J. A.; Gaison, J. K.; Gladstone, L.; Guigue, M.; Hartse, J.; Heeger, K. M.; Huyan, X.; Jones, A. M.; Kazkaz, K.; LaRoque, B. H.; Li, M.; Lindman, A.; Machado, E.; Marsteller, A.; Matthé, C.; Mohiuddin, R.; Monreal, B.; Mueller, R.; Nikkel, J. A.; Novitski, E.; Oblath, N. S.; Peña, J. I.; Pettus, W.; Reimann, R.; Robertson, R. H.; Rosa De Jesús, D.; Rybka, G.; Saldaña, L.; Schram, M.; Slocum, P. L.; Stachurska, J.; Sun, Y. -H.; Surukuchi, P. T.; Tedeschi, J. R.; Telles, A. B.; Thomas, F.; Thomas, M.; Thorne, L. A.; Thümmler, T.; Tvrznikova, L.; Van De Pontseele, W.; VanDevender, B. A.; Weintroub, J.; Weiss, T. E.; Wendler, T.; Young, A.; Zayas, E.; Ziegler, A.
Physical review. C, 03/2024, Volume: 109, Issue: 3Journal Article
Project 8 has developed a novel technique, cyclotron radiation emission spectroscopy (CRES), for direct neutrino mass measurements. A CRES-based experiment on the beta spectrum of tritium has been carried out in a small-volume apparatus. Here, we provide a detailed account of the experiment, focusing on systematic effects and analysis techniques. In a Bayesian (frequentist) analysis, we measure the tritium endpoint as ${18}$ ${553}_{—19}^{+18}$ (${18}$ ${548}_{—19}^{+19}$) eV and set upper limits of 155 (152) eV (90% C.L.) on the neutrino mass. No background events are observed beyond the endpoint in 82 days of running. We also demonstrate an energy resolution of 1.66 ± 0.19 eV in a resolution-optimized magnetic trap configuration by measuring 83mKr 17.8-keV internal-conversion electrons. These measurements establish CRES as a low-background, high-resolution technique with the potential to advance neutrino mass sensitivity
