Neutron lifetime experiment with pulsed cold neutrons at J-PARC

Go Ichikawa; Yasuhiro Fuwa; Takuro Hasegawa; Masahiro Hino; Katsuya Hirota; Takashi Ino; Yoshihisa Iwashita; Masaaki Kitaguchi; Jun Koga; Shun Matsuzaki; Kenji Mishima; Takanori Mogi; Koki Morikawa; Hiroki Okabe; Hidetoshi Otono; Yoshichika Seki; Daiichiro Sekiba; Tatsushi Shima; Haruki Shimizu; Hirohiko Shimizu; Naoyuki Sumi; Hirochika Sumino; Satoru Yamashita; Kodai Yano; Tamaki Yoshioka

Neutron lifetime experiment with pulsed cold neutrons at J-PARC

Go Ichikawa, Yasuhiro Fuwa, Takuro Hasegawa, Masahiro Hino, Katsuya Hirota, Takashi Ino, Yoshihisa Iwashita, Masaaki Kitaguchi, Jun Koga, Shun Matsuzaki, Kenji Mishima, Takanori Mogi, Koki Morikawa, Hiroki Okabe, Hidetoshi Otono, Yoshichika Seki, Daiichiro Sekiba, Tatsushi Shima, Haruki Shimizu, Hirohiko ShimizuNaoyuki Sumi, Hirochika Sumino, Satoru Yamashita, Kodai Yano, Tamaki Yoshioka

Research output: Contribution to journal › Conference article › peer-review

Abstract

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.

Original language	English
Article number	457
Journal	Proceedings of Science
Volume	380
Publication status	Published - 2022 May 24
Externally published	Yes
Event	22nd Particles and Nuclei International Conference, PANIC 2021 - Virtual, Online, Portugal Duration: 2021 Sept 5 → 2021 Sept 10

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Ichikawa, G, Fuwa, Y, Hasegawa, T, Hino, M, Hirota, K, Ino, T, Iwashita, Y, Kitaguchi, M, Koga, J, Matsuzaki, S, Mishima, K, Mogi, T, Morikawa, K, Okabe, H, Otono, H, Seki, Y, Sekiba, D, Shima, T, Shimizu, H, Shimizu, H, Sumi, N, Sumino, H, Yamashita, S, Yano, K & Yoshioka, T 2022, 'Neutron lifetime experiment with pulsed cold neutrons at J-PARC', Proceedings of Science, vol. 380, 457.

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abstract = "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.",

author = "Go Ichikawa and Yasuhiro Fuwa and Takuro Hasegawa and Masahiro Hino and Katsuya Hirota and Takashi Ino and Yoshihisa Iwashita and Masaaki Kitaguchi and Jun Koga and Shun Matsuzaki and Kenji Mishima and Takanori Mogi and Koki Morikawa and Hiroki Okabe and Hidetoshi Otono and Yoshichika Seki and Daiichiro Sekiba and Tatsushi Shima and Haruki Shimizu and Hirohiko Shimizu and Naoyuki Sumi and Hirochika Sumino and Satoru Yamashita and Kodai Yano and Tamaki Yoshioka",

note = "Publisher Copyright: {\textcopyright} 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); 22nd Particles and Nuclei International Conference, PANIC 2021 ; Conference date: 05-09-2021 Through 10-09-2021",

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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

SN - 1824-8039

VL - 380

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 457

T2 - 22nd Particles and Nuclei International Conference, PANIC 2021

Y2 - 5 September 2021 through 10 September 2021

ER -

Neutron lifetime experiment with pulsed cold neutrons at J-PARC

Abstract

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