Bose-Einstein correlations of three charged pions in hadronic Z0 decays

Kartvelishvili, Vakhtang (1998) Bose-Einstein correlations of three charged pions in hadronic Z0 decays. European Physical Journal C: Particles and Fields, 5 (2). pp. 239-248. ISSN 1434-6044

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Abstract

Bose-Einstein Correlations (BEC) of three identical charged pions were studied in 4×1064×106 hadronic Z0Z0 decays recorded with the OPAL detector at LEP. The genuine three-pion correlations, corrected for the Coulomb effect, were separated from the known two-pion correlations by a new subtraction procedure. A significant genuine three-pion BEC enhancement near threshold was observed having an emitter source radius of r3=0.580±0.004 (stat.)±0.029 (syst.) fmr3=0.580±0.004 (stat.)±0.029 (syst.) fm and a strength of λ3=0.504±0.010 (stat.)±0.041 (syst.)λ3=0.504±0.010 (stat.)±0.041 (syst.). The Coulomb correction was found to increase the λ3λ3 value by ∼∼9% and to reduce r3r3 by ∼∼6%. The measured λ3λ3 corresponds to a value of 0.707±0.014 (stat.)±0.078 (syst.)0.707±0.014 (stat.)±0.078 (syst.) when one takes into account the three-pion sample purity. A relation between the two-pion and the three-pion source parameters is discussed.

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
82550
Deposited By:
Deposited On:
01 Nov 2016 15:20
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 06:22