Measurement of the ratio Γ(KL-->π+π-)/Γ(KL-->πlν ) for KL with 65 GeV/c laboratory momentum
Abstract
We have measured the ratio Γ(KL-->π+π-)/Γ(KL-->πlν ) to be (3.13+/-0.14)×10-3 for KL with a mean laboratory momentum of 65 GeV/c. This value corresponds to the CP-nonconservation parameter ||η+-||=(2.28+/-0.06)×10- 3, and is consistent with the world average ||η+-||=(2.274+/-0.022)×10 -3 which is derived from measurements with KL laboratory momenta less than 10 GeV/c. In this experiment we find no evidence for an energy dependence of ||η+-||.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 1985
- DOI:
- 10.1103/PhysRevLett.55.566
- Bibcode:
- 1985PhRvL..55..566C
- Keywords:
-
- 13.25.+m;
- 11.30.Er;
- 13.20.Eb;
- 14.40.Aq;
- Charge conjugation parity time reversal and other discrete symmetries;
- Decays of K mesons;
- pi K and eta mesons