# Measurement of an elongation of the pion source in Z decays

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
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 $0.81\pm 0.02 ^{+0.03}_{-0.19}$.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00003667
Contributor : Sylvie Flores <>
Submitted on : Wednesday, November 3, 1999 - 10:19:06 AM
Last modification on : Friday, December 4, 2020 - 1:22:16 PM

### Citation

M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, et al.. Measurement of an elongation of the pion source in Z decays. Physics Letters B, Elsevier, 1999, 458, pp.517-528. ⟨10.1016/S0370-2693(99)00662-0⟩. ⟨in2p3-00003667⟩

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