The MTV experiment: A test of time reversal symmetry using polarized 8Li

J. Murata, H. Baba, J. A. Behr, Y. Hirayama, T. Iguri, M. Ikeda, T. Kato, H. Kawamura, R. Kishi, C. D.P. Levy, Y. Nakaya, K. Ninomiya, N. Ogawa, J. Onishi, R. Openshaw, M. Pearson, E. Seitaibashi, S. Tanaka, R. Tanuma, Y. TotsukaT. Toyoda

Research output: Chapter in Book/Report/Conference proceedingChapter


The MTV (Mott Polarimetry for T-Violation Experiment) experiment at TRIUMF-ISAC (Isotope Separator and ACcelerator), which aims to achieve the highest precision test of time reversal symmetry in polarized nuclear beta decay by measuring a triple correlation (R-correlation), is motivated by the search for a new physics beyond the Standard Model. In this experiment, the existence of non-zero transverse electron polarization is examined utilizing the analyzing power of Mott scattering from a thin metal foil. Backward scattering electron tracks are measured using a multi-wire drift chamber for the first time. The MTV experiment was commissioned at ISAC in 2009 using an 80%polarized 8Li beam at 107 pps, resulting in 0.1%statistical precision on the R-parameter in the first physics run performed in 2010. Next generation cylindrical drift chamber (CDC) is now being installed for the future run.

Original languageEnglish
Title of host publicationISAC and ARIEL
Subtitle of host publicationThe TRIUMF Radioactive Beam Facilities and the Scientific Program
PublisherSpringer Netherlands
Number of pages4
ISBN (Electronic)9789400779631
ISBN (Print)9789400779624
Publication statusPublished - 2014 Jan 1


  • Electron polarimeter
  • Test of standard model
  • Time reversal symmetry

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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