Phys. Rev. D 67, 012005 (2003) [33 pages]Measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon systemSee Also: Erratum Received 6 August 2002; published 27 January 2003 We present a series of measurements based on KL,S→π+π- and KL,S→π0π0 decays collected in 1996–1997 by the KTeV experiment (E832) at Fermilab. We compare these four K⃗ππ decay rates to measure the direct CP violation parameter Re(ε′/ε)=(20.7±2.8)×10-4. We also test CPT symmetry by measuring the relative phase between the CP violating and CP conserving decay amplitudes for K⃗π+π- (φ+-) and for K⃗π0π0 (φ00). We find the difference between the relative phases to be Δφ≡φ00-φ+-=(+0.39±0.50)°, and the deviation of φ+- from the superweak phase to be φ+--φSW=(+0.61±1.19)°; both results are consistent with CPT symmetry. In addition, we present new measurements of the KL-KS mass difference and KS lifetime: Δm=(5261±15)×106ħs-1 and τS=(89.65±0.07)×10-12s. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.67.012005
DOI:
10.1103/PhysRevD.67.012005
PACS:
11.30.Er, 13.25.Es, 14.40.Aq
See AlsoErratum: A. Alavi-Harati et al., Erratum: Measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system [Phys. Rev. D 67, 012005 (2003)], Phys. Rev. D 70, 079904 (2004). |
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