APS » PROLA » Phys. Rev. Lett. » Volume 75 » Issue 15

Phys. Rev. Lett. 75, 2803 - 2806 (1995)

New Measurement of the CP Violation Parameter η+-γ

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J. N. Matthews et al.
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Received 20 March 1995

We have measured the CP violation parameter η+-γ in a neutral kaon experiment, E773, at Fermilab. This parameter characterizes CP violation in the decay KL→π+π-γ. Kaon decays into π+π- collected simultaneously were used for normalization. Our result is |η+-γ|  =  [2.359±0.062(stat)±0.040(syst)]×10-3 with a phase φ+-γ  =  [43.8±3.5(stat)±1.9(syst)]°. The prediction that η+-γ should be very close to η+- is supported by our result.


©1995 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v75/p2803
DOI: 10.1103/PhysRevLett.75.2803
PACS: 11.30.Er, 13.25.Es, 13.40.Hq, 14.40.Aq

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