Experimental constraints on models of CP violations

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5149893

Schmidt, M P; Adair, R K; Black, J K; Blatt, S R; Campbell, M K; Kasha, H; Larsen, R C; Leipuner, L B; Morse, W M

A review is presented of the experimental efforts at the Brookhaven AGS to study the nature of CP violation in the decays of kaons. The current research focuses on sensitive searches for a violation of time-reversal (T) invariance in the decay K ..-->.. ..mu nu../sub ..mu../ as evidenced by a nonzero component of muon polarization normal to the decay plane. The ongoing program of research includes a study of direct CP violation in the decays of neutral kaons through a precise (1%) measurement of absolute value of eta/sub 00//absolute value of eta/sub +-/, the ratio of the CP violating amplitudes for the decays of neutral kaons into neutral and charged two pion final states. Results will be presented on the decay K/sub L//sup 0/ ..-->.. ..pi../sup -/..mu../sup +/..nu../sub ..mu../, where we have found the ratio of T violating to T conserving transverse polarization of the muons to be <P/sub n//P/sub t/> = 0.004 +- 0.009, consistent with T invariance. Preliminary results for the polarization of muons in the decay K/sup +/ ..-->.. ..pi../sup 0/..mu../sup +/..nu../sub ..mu../ will be discussed.

• Research Organization: Yale Univ., New Haven, CT (USA); Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5149893
• Report Number(s): BNL-28119; CONF-800724-11
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
LEPTONS
MESONS
MUONS
ORIENTATION
P INVARIANCE
PSEUDOSCALAR MESONS
SPIN ORIENTATION
STRANGE PARTICLES
T INVARIANCE