Characterization of the correlated background for a sterile neutrino search using the first dataset of the JSNS $$^2$$ 2 experiment
oleh: Y. Hino, S. Ajimura, M. K. Cheoun, J. H. Choi, T. Dodo, H. Furuta, J. Goh, K. Haga, M. Harada, S. Hasegawa, T. Hiraiwa, W. Hwang, H. I. Jang, J. S. Jang, H. Jeon, S. Jeon, K. K. Joo, J. R. Jordan, D. E. Jung, S. K. Kang, Y. Kasugai, T. Kawasaki, E. J. Kim, J. Y. Kim, S. B. Kim, W. Kim, H. Kinoshita, T. Konno, C. Y. Lee, D. H. Lee, S. Lee, I. T. Lim, C. Little, E. Marzec, T. Maruyama, S. Masuda, S. Meigo, S. Monjushiro, D. H. Moon, T. Nakano, M. Niiyama, K. Nishikawa, M. Nomachi, M. Y. Pac, J. S. Park, R. G. Park, S. J. M. Peeters, H. Ray, C. Rott, K. Sakai, S. Sakamoto, T. Shima, C. D. Shin, J. Spitz, F. Suekane, Y. Sugaya, K. Suzuya, M. Taira, R. Ujiie, Y. Yamaguchi, M. Yeh, I. S. Yeo, C. Yoo, I. Yu
| Format: | Article |
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| Diterbitkan: | SpringerOpen 2022-04-01 |
Deskripsi
Abstract JSNS $$^2$$ 2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that is searching for sterile neutrinos via the observation of $${\bar{\nu }}_{\mu } \rightarrow {\bar{\nu }}_{e}$$ ν ¯ μ → ν ¯ e appearance oscillations using muon decay-at-rest neutrinos. Before dedicated data taking in the first-half of 2021, we performed a commissioning run for 10 days in June 2020. Using the data obtained in this commissioning run, in this paper, we present an estimate of the correlated background which imitates the $${\bar{\nu }}_{e}$$ ν ¯ e signal in a sterile neutrino search. In addition, in order to demonstrate future prospects of the JSNS $$^2$$ 2 experiment, possible pulse shape discrimination improvements towards reducing cosmic ray induced fast neutron background are described.