Measurement of an Elongation of the Pion Source in Z Decays

Abstract

We measure Bose-Einstein correlations between like-sign charged pion pairs in hadronic Z decays with the L3 detector at LEP. The analysis is performed in three dimensions in the longitudinal center-of-mass system. The pion source is found to be elongated along the thrust axis with a ratio of transverse to longitudinal radius of $0.81\pm 0.02_{-0.19}^{+0.03}$.

Cited by in corpus (23)

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