PoS - Proceedings of Science
Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Tests of symmetries and conservation laws
Neutron lifetime experiment with pulsed cold neutrons at J-PARC
G. Ichikawa*, Y. Fuwa, T. Hasegawa, M. Hino, K. Hirota, T. Ino, Y. Iwashita, M. Kitaguchi, J. Koga, S. Matsuzaki, K. Mishima, T. Mogi, K. Morikawa, H. Okabe, H. Otono, Y. Seki, D. Sekiba, T. Shima, H. Shimizu, H.M. Shimizu, N. Sumi, H. Sumino, S. Yamashita, K. Yano and T. Yoshioka
Full text: pdf
Pre-published on: March 02, 2022
Published on:
Abstract
A free neutron decays in a lifetime of about $880\,\mathrm{s}$.
Although the neutron lifetime is an important parameter in modern physics,
there is a $4.6\sigma$ ($9.5\,\mathrm{s}$) 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.
DOI: https://doi.org/10.22323/1.380.0457
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.