  We have designed a new experiment (E923) at the BNL-AGS to search for the
T-violating polarization of the muon normal to the decay plane of the KMU3
decay. The experiment aims to search for T-violation beyond the Standard Model;
such a search is motivated by the need for a stronger CP violation source to
account for the baryon asymmetry of the Universe.
  The experiment will be performed with in-flight decays from an intense
(2.10e7 K/sec) 2 GeV/c separated K+ beam in an existing beam-line at the AGS.
We expect to analyze more than 10e9 events to obtain the sensitivity of (delta
P_t = +-0.00013) at 1 sigma, corresponding to the sensitivity of +-0.0007 to
Im(xi), an improvement by 40 over the present limit on the same measurement.
This paper describes the motivation for this experiment as well as other
measurements of the same type. The experimental technique and the sensitivity
is also described.
