## Abstract

The production of neutral kaons in e^{+}e^{-} annihilation at centre-of-mass energies in the region of the Z^{0} mass and their Bose-Einstein correlations are investigated with the OPAL detector at LEP. A total of about 1.26×10^{6} Z^{0} hadronic decay events are used in the analysis. The production rate of K^{0} mesons is found to be 1.99±0.01±0.04 per hadronic event, where the first error is statistical and the second systematic. Both the rate and the differential cross section for K^{0} production are compared to the predictions of Monte Carlo generators. This comparison indicates that the fragmentation is too soft in both Jetset and Herwig. Bose-Einstein correlations in K_{s}^{0}K_{s}^{0} pairs are measured through the quantity Q, the four momentum difference of the pair. A threshold enhancement is observed in K_{s}^{0}K_{s}^{0} pairs originating from a mixed sample of {Mathematical expression} and K^{0}K^{0} ( {Mathematical expression}) pairs. For the strength of the effect and for the radius of the emitting source we find values of λ=1.14±0.23±0.32 and R_{0}=(0.76±0.10±0.11) fm respectively. The first error is statistical and the second systematic.

Original language | English |
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Pages (from-to) | 389-401 |

Number of pages | 13 |

Journal | European Physical Journal C |

Volume | 67 |

Issue number | 3 |

DOIs | |

State | Published - 1 Sep 1995 |

Externally published | Yes |

## ASJC Scopus subject areas

- Physics and Astronomy (miscellaneous)

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