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

  • Experimental physics
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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 \(\mathrm{Re}(\varepsilon'/\varepsilon) = (15.3 \pm 2.6)\times 10^{-4}\).

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Authors and Affiliations

  1. Dipartimento di Fisica dell'Università e Sezione dell'INFN di Cagliari, 09100 Cagliari, Italy, , , , , , IT

    A. Lai et al.

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  1. A. Lai et al.
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The NA48 Collaboration

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Received: 20 July 2001 / Published online: 21 November 2001

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The NA48 Collaboration., Lai et al., A. A precise measurement of the direct CP violation parameter \(\mathrm{Re}(\varepsilon'/\varepsilon)\) . Eur. Phys. J. C 22, 231–254 (2001). https://doi.org/10.1007/s100520100822

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  • DOI: https://doi.org/10.1007/s100520100822

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