Aniello Nappi

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  • A Lai, D Marras, +155 authors L Widhalm¨osterreichische
  • 2001
The direct CP violation parameter Re(ε ′ /ε) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. With 3.3 million KL → π 0 π 0 events collected during the 1998 and 1999 running periods, a result of Re(ε ′ /ε) = (15.0 ± 2.7)×10 −4 has been obtained. The result combined with the published 1997 sample(More)
The direct CP violation parameter Re((//) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. The 2001 running period was devoted to collecting additional data under varied conditions compared to earlier years (1997–1999). The new data yield the result: Re((//) = (13.7 ± 3.1) × 10 −4. Combining(More)
The phases of the CP-violating amplitudes in K°-*~+~-and K°~2n ° decays, ¢~+ _ =46.9 ° + 2.2: and 000=47.1 ° + 2.8% have been measured in the same experiment, and a direct comparison gives the phase difference ¢co-0+-=0.2 ° + 2.9 °. This result leads to an upper limit on possible CPT violation in the K ° mass matrix, of I (mR~-mKo)/m~:o I < 5 × I 0-~8 at(More)
ADDENDUM 2 TO P253 A high sensitivity investigation of K S and neutral hyperon decays using a modified K S beam. 1 Introduction We propose to use the NA48 detectors and a slightly modified beam line to search for very rare K S decays. The sensitivity of the experiment will also allow us to perform systematic studies on several less rare K S decays and on(More)