A high sensitivity search for CP violating rare K[sub L] decays and precision measurement of the direct CP violation parameter [epsilon][prime]/[epsilon] via the four K [yields] 2[pi] decay modes, Task J

Technical Report · Sat May 01 04:00:00 EDT 1993

DOI:https://doi.org/10.2172/6326950· OSTI ID:6326950

Wah, Yau W

Fermilab experiments E731, E773, E799, and E832 are a series of experiments to investigate the physics of CP violation, CPT violation,and rare decays of the neutral kaon system. E731 finished data taking in 1988, during past year the full data set analysis was completed and yielded ([var epsilon][prime]/[var epsilon])[sub 2[pi]]=(7.4 [plus minus] 5.2 [stat] [plus minus] 2.9 [syst] ) [times] 10[sup [minus]4] . The value favors a high top ark mass value within the Standard Model. E773 tests CPT violation by determining ([Delta][phi])[sub 2[pi]] with an accuracy of about 0.5[sup 0]. Data were taken during the last Fermilab Fixed Target run period between September and November 1991. It is anticipated the data analysis will be finished within a year. E799, with the primary goal of observing direct Cp Violation via searching for the rare decay K[sub L][yields] [pi][sup 0] l [sup +]l[sup [minus]] (where l = e, [mu] [nu]) took test data between November 1991 and January 1992 (Phase 1). Some preliminary results are shown here. E799 (Phase II) and E832 (a follow up experiment of E731) are scheduled to take data after the current Fermilab collider run with a new facility and detector.

• Research Organization: Chicago Univ., IL (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-90ER40560
• OSTI ID: 6326950
• Report Number(s): DOE/ER/40560-4J; ON: DE93016866
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
BRANCHING RATIO
CP INVARIANCE
DATA
DATA COVARIANCES
DECAY
DOCUMENT TYPES
ELECTRONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRONS
INFORMATION
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONS
MASS
MASSLESS PARTICLES
MATTER
MESONS
NEUTRINOS
NUMERICAL DATA
PARTICLE DECAY
PHOTONS
PIONS
POSITRONS
POSTULATED PARTICLES
PROGRESS REPORT
PSEUDOSCALAR MESONS
QUARKS
STRANGE MESONS
STRANGE PARTICLES
WEAK PARTICLE DECAY