Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-10-13
Physics
High Energy Physics
High Energy Physics - Experiment
4 pages, 2 figures, presented by EK at XLI International Symposium on Multiparticle Dynamics (ISMD 2011), 26-30 September 2011
Scientific paper
Neutral pion number fluctuations have been measured in proton interactions at U-70 accelerator (IHEP, Protvino). The experiment is carried out on the SVD-2 setup. Charged and neutral particles are registered simultaneously. The reconstruction of $\pi ^0$-mesons is fulfilled by means of observed gamma quanta at the electromagnetic calorimeter. The corrections on the setup acceptance, triggering, efficiencies of detectors and the reconstruction algorithm are included. The multiplicity distributions of the neutral pions have permitted to define the scaled variance, $\omega $, for $\pi ^0$-mesons. The revealed sharp growth of fluctuations of the neutral pion number at total meson multiplicities more than 22 can indicate the Bose-Einstein condensate formation.
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