出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We have proposed a new experiment to search for time reversal invariance violation by measuring
the transverse muon polarization (PT ) in K+!p0m+n decay at J-PARC. The physics potential in
terms of the discovery of new physics along with the power to constrain exotic models is shown
to be competitive with other experiments being planned or prepared. The detector system will
be an upgraded version of the previous KEK-PS E246 experiment. Major changes are 1) a more
highly segmented K+ target, 2) improved charged particle tracking by incorporating state-of-theart
GEM detectors, 3) a new readout system for the CsI(Tl) calorimeter with APD, 4) introducing
active polarimeters for the muons and decay positrons inside a new muon field magnet. Moreover,
a new analysis procedure using arbitary initial muon spin phases at the polarimeter will be applied.
These arrangements will improve both the statistical and the systematic errors and should result
in an overall error DPT 10−4.
