Abstract
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 K→ππ 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 K→π+π− (φ+−) and for K→π0π0 (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. Received 6 August 2002DOI:https://doi.org/10.1103/PhysRevD.67.012005©2003 American Physical Society
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
