Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K-S -> 3 pi(0) has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K-0/(K) over bar (0) -> 3 pi(0) decays, the CP violating amplitude eta(000) = A(K-S -> 3 pi(0))/A(K-L -> 3 pi(0)) has been found to be Re(eta(000)) = -0.002 +/- 0.011 +/- 0.015 and Im(eta(000)) = -0.003 +/- 0.013 +/- 0.017. This corresponds to an upper limit on the branching fraction of Br(K-S -> 3 pi(0)) < 7.4 x 10(-7) at 90% confidence level. The result is used to improve knowledge of Re(epsilon) and the CPT violating quantity Im(delta) via the Bell-Steinberger relation. (c) 2005 Elsevier B.V. All rights reserved.

Search for CP violation in K-0 -> 3 pi(0) decays

MENICHETTI, Ezio;
2005-01-01

Abstract

Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K-S -> 3 pi(0) has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K-0/(K) over bar (0) -> 3 pi(0) decays, the CP violating amplitude eta(000) = A(K-S -> 3 pi(0))/A(K-L -> 3 pi(0)) has been found to be Re(eta(000)) = -0.002 +/- 0.011 +/- 0.015 and Im(eta(000)) = -0.003 +/- 0.013 +/- 0.017. This corresponds to an upper limit on the branching fraction of Br(K-S -> 3 pi(0)) < 7.4 x 10(-7) at 90% confidence level. The result is used to improve knowledge of Re(epsilon) and the CPT violating quantity Im(delta) via the Bell-Steinberger relation. (c) 2005 Elsevier B.V. All rights reserved.
2005
610
165
176
J. R. Batley;R. S. Dosanjh;T. J. Gershon;G. E. Kalmus;C. Lazzeroni;D. J. Munday;E. Olaiya;M. A. Parker;T. O. White;S. A. Wotton;R. Arcidiac...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/109219
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 31
  • ???jsp.display-item.citation.isi??? 0
social impact