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The MTV experiment: a test of time reversal symmetry using polarized 8Li |
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| Authors: | 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 Totsuka T Toyoda |
| Institution: | 1. Department of Physics, Rikkyo University, Tokyo, 171-8501, Japan 2. Nishina Center, RIKEN, Saitama, 351-0198, Japan 3. TRIUMF, Vancouver, BC, V6T 2A3, Canada 4. KEK, Tsukuba, Ibaraki, 305-0801, Japan 5. Cyclotron and Radioisotope Center, Tohoku University, Miyagi, 980-8578, Japan |
| Abstract: | 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. |
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