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

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Article number1750058
JournalModern Physics Letters A
Volume32
Issue number10
DOIs
Publication statusPublished - 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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