Search For New Mechanism of CP Violation through Tau Decay and Semilpetonic Decay of Hadron.pdfVIP

SLAC–PUB–7360 November 1996 6 9 Search For New Mechanism of CP Violation through 9 ∗ 1 Tau Decay and Semilpetonic Decay of Hadrons c e D Yung Su Tsai 6 Stanford Linear Accelerator Center 1 Stanford University, Stanford, California 94309 v e-mail:ystth@slac.stanford.edu 1 8 2 2 1 Abstract 6 9 / h If CP is violated in any decay process involving leptons it will signify the existense p- of a new force (called the X boson) responsible for CP violation that may be the p key to understanding matter-antimatter asymmetry in the universe. We discuss the e signatures of CP violation in (1) the decay of tau lepton, and (2) the semileptonic h : decay of π, K , D, B and t particles by measuring the polarization of the charged v i lepton in the decay. We discuss how the coupling constants and their phases of the X coupling of the X boson to 9 quark vertices and 3 lepton vertices can be obtained r a through 12 decay processes. Presented to the Proceedings of the Fourth International Workshop on Tau Physics Estes Park, Colorado 16–19 September 1996 ∗Work supported by the Department of Energy, contract DE–AC03–76SF00515. 1 INTRODUCTION The only particle that exhibits CP violatio