A new measurement of electron transverse polarization in polarized nuclear β-decay

H. Kawamura; T. Akiyama; M. Hata; Y. Hirayama; M. Ikeda; Y. Ikeda; T. Ishii; D. Kameda; S. Mitsuoka; H. Miyatake; D. Nagae; Y. Nakaya; K. Ninomiya; M. Nitta; N. Ogawa; J. Onishi; E. Seitaibashi; S. Tanaka; R. Tanuma; Y. Totsuka; T. Toyoda; Y. X. Watanabe; J. Murata

doi:10.1142/S0217732317500584

A new measurement of electron transverse polarization in polarized nuclear β-decay

H. Kawamura, T. Akiyama, M. Hata, Y. Hirayama, M. Ikeda, Y. Ikeda, T. Ishii, D. Kameda, S. Mitsuoka, H. Miyatake, D. Nagae, Y. Nakaya, K. Ninomiya, M. Nitta, N. Ogawa, J. Onishi, E. Seitaibashi, S. Tanaka, R. Tanuma, Y. TotsukaT. Toyoda, Y. X. Watanabe, J. Murata

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Abstract

The Mott polarimetry for T-violation (MTV) experiment tests time-reversal symmetry in polarized nuclear β-decay by measuring an electron's transverse polarization as a form of angular asymmetry in Mott scattering using a thin metal foil. A Mott scattering analyzer system developed using a tracking detector to measure scattering angles offers better event selectivity than conventional counter experiments. In this paper, we describe a pilot experiment conducted at KEK-TRIAC using a prototype system with a polarized 8Li beam. The experiment confirmed the sound performance of our Mott analyzer system to measure T-violating triple correlation (R correlation), and therefore recommends its use in higher-precision experiments at the TRIUMF-ISAC.

Original language	English
Article number	1750058
Journal	Modern Physics Letters A
Volume	32
Issue number	10
DOIs	https://doi.org/10.1142/S0217732317500584
Publication status	Published - 2017 Mar 28

Keywords

Mott polarimetry
T-violation
β-decay

ASJC Scopus subject areas

Nuclear and High Energy Physics
Astronomy and Astrophysics
Physics and Astronomy(all)

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Kawamura, H., Akiyama, T., Hata, M., Hirayama, Y., Ikeda, M., Ikeda, Y., Ishii, T., Kameda, D., Mitsuoka, S., Miyatake, H., Nagae, D., Nakaya, Y., Ninomiya, K., Nitta, M., Ogawa, N., Onishi, J., Seitaibashi, E., Tanaka, S., Tanuma, R., ... Murata, J. (2017). A new measurement of electron transverse polarization in polarized nuclear β-decay. Modern Physics Letters A, 32(10), [1750058]. https://doi.org/10.1142/S0217732317500584

A new measurement of electron transverse polarization in polarized nuclear β-decay. / Kawamura, H.; Akiyama, T.; Hata, M.; Hirayama, Y.; Ikeda, M.; Ikeda, Y.; Ishii, T.; Kameda, D.; Mitsuoka, S.; Miyatake, H.; Nagae, D.; Nakaya, Y.; Ninomiya, K.; Nitta, M.; Ogawa, N.; Onishi, J.; Seitaibashi, E.; Tanaka, S.; Tanuma, R.; Totsuka, Y.; Toyoda, T.; Watanabe, Y. X.; Murata, J.

In: Modern Physics Letters A, Vol. 32, No. 10, 1750058, 28.03.2017.

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

Kawamura, H, Akiyama, T, Hata, M, Hirayama, Y, Ikeda, M, Ikeda, Y, Ishii, T, Kameda, D, Mitsuoka, S, Miyatake, H, Nagae, D, Nakaya, Y, Ninomiya, K, Nitta, M, Ogawa, N, Onishi, J, Seitaibashi, E, Tanaka, S, Tanuma, R, Totsuka, Y, Toyoda, T, Watanabe, YX & Murata, J 2017, 'A new measurement of electron transverse polarization in polarized nuclear β-decay', Modern Physics Letters A, vol. 32, no. 10, 1750058. https://doi.org/10.1142/S0217732317500584

Kawamura, H. ; Akiyama, T. ; Hata, M. ; Hirayama, Y. ; Ikeda, M. ; Ikeda, Y. ; Ishii, T. ; Kameda, D. ; Mitsuoka, S. ; Miyatake, H. ; Nagae, D. ; Nakaya, Y. ; Ninomiya, K. ; Nitta, M. ; Ogawa, N. ; Onishi, J. ; Seitaibashi, E. ; Tanaka, S. ; Tanuma, R. ; Totsuka, Y. ; Toyoda, T. ; Watanabe, Y. X. ; Murata, J. / A new measurement of electron transverse polarization in polarized nuclear β-decay. In: Modern Physics Letters A. 2017 ; Vol. 32, No. 10.

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AU - Hirayama, Y.

AU - Ikeda, M.

AU - Ikeda, Y.

AU - Ishii, T.

AU - Kameda, D.

AU - Mitsuoka, S.

AU - Miyatake, H.

AU - Nagae, D.

AU - Nakaya, Y.

AU - Ninomiya, K.

AU - Nitta, M.

AU - Ogawa, N.

AU - Onishi, J.

AU - Seitaibashi, E.

AU - Tanaka, S.

AU - Tanuma, R.

AU - Totsuka, Y.

AU - Toyoda, T.

AU - Watanabe, Y. X.

AU - Murata, J.

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