First JSNS2 measurement of the electron neutrino flux using the (Formula presented) reaction

JSNS2 Collaboration

doi:10.1103/fq6x-6d19

First JSNS² measurement of the electron neutrino flux using the (Formula presented) reaction

JSNS2 Collaboration

School of Natural Sciences

Tohoku University
Japan Atomic Energy Agency
Soongsil University
Dongshin University
Seoyeong University
Kyung Hee University
J-PARC Center
Gwangju Institute of Science and Technology
Chonnam National University
Sungkyunkwan University
Kitasato University
Jeonbuk National University
Sun Yat-Sen University
High Energy Accelerator Research Organization, Tsukuba
University of Michigan, Ann Arbor
The University of Osaka
Kyoto Sangyo University
Kyungpook National University
University of Sussex

Research output: Contribution to journal › Article › peer-review

Abstract

JSNS² (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment searching for sterile neutrinos through the observation of (Formula presented) 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 (Formula presented) reaction in JSNS², yielding a flux of ð6.7 ± 1.6ðstatÞ ± 1.7ðsystÞÞ × 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.

Original language	English
Article number	032012
Journal	Physical Review D
Volume	112
Issue number	3
DOIs	https://doi.org/10.1103/fq6x-6d19
State	Published - 28 Aug 2025

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@article{4a8085e9ab964b34bfb87ff2a851ce98,

title = "First JSNS2 measurement of the electron neutrino flux using the (Formula presented) 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 (Formula presented) 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 (Formula presented) reaction in JSNS2, yielding a flux of {\dh}6.7 ± 1.6{\dh}stat{\TH} ± 1.7{\dh}syst{\TH}{\TH} × 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.",

author = "\{JSNS2 Collaboration\} and T. Dodo and Cheoun, \{M. K.\} and Choi, \{J. H.\} and Choi, \{J. Y.\} and J. Goh and K. Haga and M. Harada and S. Hasegawa and W. Hwang and Jang, \{H. I.\} and Jang, \{J. S.\} and Joo, \{K. K.\} and Jung, \{D. E.\} and Kang, \{S. K.\} and Y. Kasugai and T. Kawasaki and Kim, \{E. M.\} and Kim, \{E. J.\} and Kim, \{S. Y.\} and Kim, \{S. B.\} and H. Kinoshita and T. Konno and Lee, \{D. H.\} and C. Little and T. Maruyama and E. Marzec and S. Masuda and S. Meigo and Moon, \{D. H.\} and T. Nakano and M. Niiyama and K. Nishikawa and Pac, \{M. Y.\} and Park, \{B. J.\} and Park, \{H. W.\} and Park, \{J. B.\} and Park, \{J. S.\} and Park, \{J. S.\} and Park, \{R. G.\} and Peeters, \{S. J.M.\} and Ryu, \{J. W.\} and K. Sakai and S. Sakamoto and T. Shima and Shin, \{C. D.\} and J. Spitz and F. Suekane and Y. Sugaya and K. Suzuya and Y. Yamaguchi",

year = "2025",

month = aug,

day = "28",

doi = "10.1103/fq6x-6d19",

language = "English",

volume = "112",

journal = "Physical Review D",

issn = "2470-0010",

number = "3",

}

TY - JOUR

T1 - First JSNS2 measurement of the electron neutrino flux using the (Formula presented) reaction

AU - JSNS2 Collaboration

AU - Dodo, T.

AU - Cheoun, M. K.

AU - Choi, J. H.

AU - Choi, J. Y.

AU - Goh, J.

AU - Haga, K.

AU - Harada, M.

AU - Hasegawa, S.

AU - Hwang, W.

AU - Jang, H. I.

AU - Jang, J. S.

AU - Joo, K. K.

AU - Jung, D. E.

AU - Kang, S. K.

AU - Kasugai, Y.

AU - Kawasaki, T.

AU - Kim, E. M.

AU - Kim, E. J.

AU - Kim, S. Y.

AU - Kim, S. B.

AU - Kinoshita, H.

AU - Konno, T.

AU - Lee, D. H.

AU - Little, C.

AU - Maruyama, T.

AU - Marzec, E.

AU - Masuda, S.

AU - Meigo, S.

AU - Moon, D. H.

AU - Nakano, T.

AU - Niiyama, M.

AU - Nishikawa, K.

AU - Pac, M. Y.

AU - Park, B. J.

AU - Park, H. W.

AU - Park, J. B.

AU - Park, J. S.

AU - Park, R. G.

AU - Peeters, S. J.M.

AU - Ryu, J. W.

AU - Sakai, K.

AU - Sakamoto, S.

AU - Shima, T.

AU - Shin, C. D.

AU - Spitz, J.

AU - Suekane, F.

AU - Sugaya, Y.

AU - Suzuya, K.

AU - Yamaguchi, Y.

PY - 2025/8/28

Y1 - 2025/8/28

N2 - JSNS2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment searching for sterile neutrinos through the observation of (Formula presented) 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 (Formula presented) reaction in JSNS2, yielding a flux of ð6.7 ± 1.6ðstatÞ ± 1.7ðsystÞÞ × 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.

AB - JSNS2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment searching for sterile neutrinos through the observation of (Formula presented) 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 (Formula presented) reaction in JSNS2, yielding a flux of ð6.7 ± 1.6ðstatÞ ± 1.7ðsystÞÞ × 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.

UR - https://www.scopus.com/pages/publications/105021353965

U2 - 10.1103/fq6x-6d19

DO - 10.1103/fq6x-6d19

M3 - Article

AN - SCOPUS:105021353965

SN - 2470-0010

VL - 112

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - 032012

ER -

First JSNS² measurement of the electron neutrino flux using the (Formula presented) reaction

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