Abstract
Motivated by a search for a new physics beyond the standard model, the MTV experiment (Mott Polarimetry for T-Violation Experiment) is intended to achieve the highest precision test of time-reversal symmetry in polarized nuclear beta decay by measuring a triple correlation (the R -correlation). The first physics run of the MTV experiment was performed in 2010 at TRIUMF-ISAC. This paper gives preliminary results and describes the next generation setup, which involves a cylindrical drift chamber.
Highlights
To explain the large matter-antimatter asymmetry observed in our universe, the MTV experiment is intended to search for a large time-reversal symmetry violation outside of the CKM mechanism
The first physics data taken in the MTV experiment were obtained at TRIUMF-ISAC in 2010 using an 80% polarized 8Li beam at 107pps, which achieved the highest statistical precision on the order of 0.1% on the R-parameter
The MTV experiment was originally started at KEK-TRIAC in 2008 [4], and was moved to TRIUMFISAC in 2009
Summary
To explain the large matter-antimatter asymmetry observed in our universe, the MTV experiment is intended to search for a large time-reversal symmetry violation outside of the CKM mechanism. DT h isatrreip pldaerEveenedctΩtnouerc cloe ar.rr.e.al ant di oe nl e.oc..ctNrcou nrs’sJJ inp othl aerRifzo altlioJJ own ivn egcEp dtoeeerc sa ,ywrhatieleep qeuaatnido(n1E[)e1]a.re the electron’s momentum vector and energy. In this experiment, the existence of non-zero transverse electron polarization is examined by utilizing the analyzing power of Mott scattering from a thin metal foil (“analyzer foil”). The obtained result is better than that in a previous study performed at PSI [3]
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