Precise neutron lifetime experiment using pulsed neutron beams at J-PARC

Naoki Nagakura; Katsuya Hirota; Sei Ieki; Takashi Ino; Yoshihisa Iwashita; Masaaki Kitaguchi; Ryunosuke Kitahara; Kenji Mishima; Aya Morishita; Hideyuki Oide; Hidetoshi Otono; Risa Sakakibara; Yoshichika Seki; Tatsushi Shima; Hirohiko M. Shimizu; Tomoaki Sugino; Naoyuki Sumi; Hirochika Sumino; Kaoru Taketani; Genki Tanaka; Tatsuhiko Tomita; Takahito Yamada; Satoru Yamashita; Mami Yokohashi; Tamaki Yoshioka

Precise neutron lifetime experiment using pulsed neutron beams at J-PARC

Naoki Nagakura, Katsuya Hirota, Sei Ieki, Takashi Ino, Yoshihisa Iwashita, Masaaki Kitaguchi, Ryunosuke Kitahara, Kenji Mishima, Aya Morishita, Hideyuki Oide, Hidetoshi Otono, Risa Sakakibara, Yoshichika Seki, Tatsushi Shima, Hirohiko M. Shimizu, Tomoaki Sugino, Naoyuki Sumi, Hirochika Sumino, Kaoru Taketani, Genki TanakaTatsuhiko Tomita, Takahito Yamada, Satoru Yamashita, Mami Yokohashi, Tamaki Yoshioka

Research Center for Advanced Particle Physics

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

Abstract

The neutron lifetime (τ_n) is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure τ_n with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate τ_n in 2016, which is expected to yield a statistical uncertainty of O(1)%. This paper presents the current analysis results and the future plans to achieve our goal precision.

Original language	English
Journal	Unknown Journal
Publication status	Published - Feb 10 2017

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Precise neutron lifetime experiment using pulsed neutron beams at J-PARC. / Nagakura, Naoki; Hirota, Katsuya; Ieki, Sei; Ino, Takashi; Iwashita, Yoshihisa; Kitaguchi, Masaaki; Kitahara, Ryunosuke; Mishima, Kenji; Morishita, Aya; Oide, Hideyuki; Otono, Hidetoshi; Sakakibara, Risa; Seki, Yoshichika; Shima, Tatsushi; Shimizu, Hirohiko M.; Sugino, Tomoaki; Sumi, Naoyuki; Sumino, Hirochika; Taketani, Kaoru; Tanaka, Genki; Tomita, Tatsuhiko; Yamada, Takahito; Yamashita, Satoru; Yokohashi, Mami; Yoshioka, Tamaki.

In: Unknown Journal, 10.02.2017.

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

Nagakura, N, Hirota, K, Ieki, S, Ino, T, Iwashita, Y, Kitaguchi, M, Kitahara, R, Mishima, K, Morishita, A, Oide, H, Otono, H, Sakakibara, R, Seki, Y, Shima, T, Shimizu, HM, Sugino, T, Sumi, N, Sumino, H, Taketani, K, Tanaka, G, Tomita, T, Yamada, T, Yamashita, S, Yokohashi, M & Yoshioka, T 2017, 'Precise neutron lifetime experiment using pulsed neutron beams at J-PARC', Unknown Journal.

Nagakura, Naoki ; Hirota, Katsuya ; Ieki, Sei ; Ino, Takashi ; Iwashita, Yoshihisa ; Kitaguchi, Masaaki ; Kitahara, Ryunosuke ; Mishima, Kenji ; Morishita, Aya ; Oide, Hideyuki ; Otono, Hidetoshi ; Sakakibara, Risa ; Seki, Yoshichika ; Shima, Tatsushi ; Shimizu, Hirohiko M. ; Sugino, Tomoaki ; Sumi, Naoyuki ; Sumino, Hirochika ; Taketani, Kaoru ; Tanaka, Genki ; Tomita, Tatsuhiko ; Yamada, Takahito ; Yamashita, Satoru ; Yokohashi, Mami ; Yoshioka, Tamaki. / Precise neutron lifetime experiment using pulsed neutron beams at J-PARC. In: Unknown Journal. 2017.

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title = "Precise neutron lifetime experiment using pulsed neutron beams at J-PARC",

abstract = "The neutron lifetime (τn) is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure τn with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate τn in 2016, which is expected to yield a statistical uncertainty of O(1)%. This paper presents the current analysis results and the future plans to achieve our goal precision.",

author = "Naoki Nagakura and Katsuya Hirota and Sei Ieki and Takashi Ino and Yoshihisa Iwashita and Masaaki Kitaguchi and Ryunosuke Kitahara and Kenji Mishima and Aya Morishita and Hideyuki Oide and Hidetoshi Otono and Risa Sakakibara and Yoshichika Seki and Tatsushi Shima and Shimizu, {Hirohiko M.} and Tomoaki Sugino and Naoyuki Sumi and Hirochika Sumino and Kaoru Taketani and Genki Tanaka and Tatsuhiko Tomita and Takahito Yamada and Satoru Yamashita and Mami Yokohashi and Tamaki Yoshioka",

year = "2017",

month = feb,

day = "10",

language = "English",

journal = "Quaternary International",

issn = "1040-6182",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Precise neutron lifetime experiment using pulsed neutron beams at J-PARC

AU - Nagakura, Naoki

AU - Hirota, Katsuya

AU - Ieki, Sei

AU - Ino, Takashi

AU - Iwashita, Yoshihisa

AU - Kitaguchi, Masaaki

AU - Kitahara, Ryunosuke

AU - Mishima, Kenji

AU - Morishita, Aya

AU - Oide, Hideyuki

AU - Otono, Hidetoshi

AU - Sakakibara, Risa

AU - Seki, Yoshichika

AU - Shima, Tatsushi

AU - Shimizu, Hirohiko M.

AU - Sugino, Tomoaki

AU - Sumi, Naoyuki

AU - Sumino, Hirochika

AU - Taketani, Kaoru

AU - Tanaka, Genki

AU - Tomita, Tatsuhiko

AU - Yamada, Takahito

AU - Yamashita, Satoru

AU - Yokohashi, Mami

AU - Yoshioka, Tamaki

PY - 2017/2/10

Y1 - 2017/2/10

N2 - The neutron lifetime (τn) is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure τn with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate τn in 2016, which is expected to yield a statistical uncertainty of O(1)%. This paper presents the current analysis results and the future plans to achieve our goal precision.

AB - The neutron lifetime (τn) is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure τn with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate τn in 2016, which is expected to yield a statistical uncertainty of O(1)%. This paper presents the current analysis results and the future plans to achieve our goal precision.

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JO - Quaternary International

JF - Quaternary International

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