TY - JOUR
T1 - Neutron lifetime experiment with pulsed cold neutrons at J-PARC
AU - Ichikawa, Go
AU - Fuwa, Yasuhiro
AU - Hasegawa, Takuro
AU - Hino, Masahiro
AU - Hirota, Katsuya
AU - Ino, Takashi
AU - Iwashita, Yoshihisa
AU - Kitaguchi, Masaaki
AU - Koga, Jun
AU - Matsuzaki, Shun
AU - Mishima, Kenji
AU - Mogi, Takanori
AU - Morikawa, Koki
AU - Okabe, Hiroki
AU - Otono, Hidetoshi
AU - Seki, Yoshichika
AU - Sekiba, Daiichiro
AU - Shima, Tatsushi
AU - Shimizu, Haruki
AU - Shimizu, Hirohiko
AU - Sumi, Naoyuki
AU - Sumino, Hirochika
AU - Yamashita, Satoru
AU - Yano, Kodai
AU - Yoshioka, Tamaki
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)
PY - 2022/5/24
Y1 - 2022/5/24
N2 - A free neutron decays in a lifetime of about 880 s. Although the neutron lifetime is an important parameter in modern physics, there is a 4.6σ (9.5 s) discrepancy between the experimental results of two typical methods: the beam method and the storage method. We are carrying out a new experimental method to measure the neutron lifetime using a pulsed neutron beam at J-PARC MLF BL05 to determine the cause of the discrepancy, whether overlooked systematic uncertainties or new physics. A review of our experiment including the first physics result with acquired data during 2014 - 2016 and the status using new neutron optics are presented here.
AB - A free neutron decays in a lifetime of about 880 s. Although the neutron lifetime is an important parameter in modern physics, there is a 4.6σ (9.5 s) discrepancy between the experimental results of two typical methods: the beam method and the storage method. We are carrying out a new experimental method to measure the neutron lifetime using a pulsed neutron beam at J-PARC MLF BL05 to determine the cause of the discrepancy, whether overlooked systematic uncertainties or new physics. A review of our experiment including the first physics result with acquired data during 2014 - 2016 and the status using new neutron optics are presented here.
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M3 - Conference article
AN - SCOPUS:85131692997
VL - 380
JO - Proceedings of Science
JF - Proceedings of Science
SN - 1824-8039
M1 - 457
T2 - 22nd Particles and Nuclei International Conference, PANIC 2021
Y2 - 5 September 2021 through 10 September 2021
ER -