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A precise measurement of the direct CP violation parameter \(\mathrm{Re}(\varepsilon'/\varepsilon)\)

  • The NA48 Collaboration
  • A. Lai et al.
Experimental physics

Abstract.

The direct CP violation parameter \(\mathrm{Re}(\varepsilon'/\varepsilon)\) 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 \(K_L \rightarrow \pi^0 \pi^0\) events collected during the 1998 and 1999 running periods, a result of \(\mathrm{Re}(\varepsilon'/\varepsilon) = (15.0 \pm 2.7)\times 10^{-4}\) has been obtained. The result combined with the published 1997 sample is \(\mathrm{Re}(\varepsilon'/\varepsilon) = (15.3 \pm 2.6)\times 10^{-4}\).

Keywords

Decay Rate Precise Measurement Neutral Kaon Violation Parameter Kaon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2001

Authors and Affiliations

  • The NA48 Collaboration
  • A. Lai et al.
    • 1
  1. 1.Dipartimento di Fisica dell'Università e Sezione dell'INFN di Cagliari, 09100 Cagliari, ItalyIT

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