DOE OSTI · 3006120
First JSNS 2 measurement of the electron neutrino flux using the 12 C(𝜈 𝑒 ,𝑒 − ) 12 N g.s. reaction
Abstract
JSNS2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment searching for sterile neutrinos through the observation of ν¯μ→ν¯e appearance oscillations, using neutrinos produced by muon decay-at-rest. A key aspect of the experiment involves accurately understanding the neutrino flux and the quantities of pions and muons, which are progenitors of (anti)neutrinos, given that their production rates have yet to be measured. We present the first electron-neutrino flux measurement using C12(νe,e−)12Ng.s. reaction in JSNS2, yielding a flux of (6.7±1.6(stat)±1.7(syst))×10−9 cm−2 proton−1 at the JSNS2 detector location, located at 24 meters distance from the mercury target. This flux measurement is consistent with predictions from simulations based on hadron models.
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Dodo, T. [Tohoku University; Advanced Science Research Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Cheoun, M. K. [Soongsil University], Choi, J. H. [Dongshin University], Choi, J. Y. [Seoyeong University], Goh, J. [Kyung Hee University], Haga, K. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Harada, M. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Hasegawa, S. [Advanced Science Research Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan; J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Hwang, W. [Kyung Hee University], Jang, H. I. [Seoyeong University], Jang, J. S. [Gwangju Institute of Science and Technology], Joo, K. K. [Chonnam National University], Jung, D. E. [Sungkyunkwan University], Kang, S. K. [Seoul National University of Science and Technology], Kasugai, Y. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Kawasaki, T. [Kitasato University], Kim, E. M. [Chonnam National University], Kim, E. J. [Jeonbuk National University], Kim, S. Y. [Chonnam National University], Kim, S. B. [Sun Yat-sen (Zhongshan) University], Kinoshita, H. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Konno, T. [Kitasato University], Lee, D. H. [High Energy Accelerator Research Organization (KEK)], Little, C. [University of Michigan], Maruyama, T. [High Energy Accelerator Research Organization (KEK)], Marzec, E. [University of Michigan], Masuda, S. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Meigo, S. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Moon, D. H. [Chonnam National University], Nakano, T. [Osaka University], Niiyama, M. [Kyoto Sangyo University], Nishikawa, K. [High Energy Accelerator Research Organization (KEK)], Pac, M. Y. [Dongshin University], Park, B. J. [Kyungpook National University], Park, H. W. [Chonnam National University], Park, J. B. [Soongsil University], Park, J. S. [Chonnam National University], Park, J. S. [Kyungpook National University], Park, R. G. [Chonnam National University], Peeters, S. J. M. [University of Sussex], Ryu, J. W. [Kyungpook National University], Sakai, K. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Sakamoto, S. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Shima, T. [Osaka University], Shin, C. D. [High Energy Accelerator Research Organization (KEK)], Spitz, J. [University of Michigan], Suekane, F. [Tohoku University], Sugaya, Y. [Osaka University], Suzuya, K. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Yamaguchi, Y. [J-PARC Center, JAEA, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan], Yeo, I. S. [Dongshin University], Yu, I. [Sungkyunkwan University]. 2025-08-28. First JSNS 2 measurement of the electron neutrino flux using the 12 C(𝜈 𝑒 ,𝑒 − ) 12 N g.s. reaction. https://doi.org/10.1103/fq6x-6d19
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