Measurement of an elongation of the pion source in Z decays

L3 Collaboration

doi:10.1016/s0370-2693(99)00662-0

Scientific article

English

Measurement of an elongation of the pion source in Z decays

ContributorsL3 Collaboration

CollaboratorsAchard, Pablo; Ambrosi, Giovanni; Bourquin, Maurice; Braccini, Saverio; Paus-Cecchi, Claudia; Chamizo Llatas, Maria; Deglon, Patrick; Extermann, Pierre; Field, John; Fredj, Lotfi; Kienzle, Maria Novella; Muheim, Franz; Produit, Nicolas

; Sciarrino, Deborah

Published inPhysics letters. B, vol. 458, no. 4, p. 517-528

Publication date1999-07-15

First online date1999-07-15

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±0.02 ^+0.03 _−0.19.

Keywords

Electron positron: colliding beams
Electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
Pi: multiple production
Correlation: two-pion
Boson: statistics
Pi: particle source
L3
Experimental results
CERN LEP Stor
Approx. 91 GeV-cms

Affiliation entities

Citation (ISO format)

L3 Collaboration. Measurement of an elongation of the pion source in Z decays. In: Physics letters. B, 1999, vol. 458, n° 4, p. 517–528. doi: 10.1016/s0370-2693(99)00662-0

Article (Published version)

Identifiers

PID : unige:187012
DOI : 10.1016/s0370-2693(99)00662-0
arXiv : hep-ex/9909009

Additional URL for this publicationhttps://linkinghub.elsevier.com/retrieve/pii/S0370269399006620

Journal ISSN0370-2693

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Measurement of an elongation of the pion source in Z decays

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