Neutral pion number fluctuations at high multiplicity in pp-interactions at 50 GeV

preprint2011arXivOpen access

2 collaboration A. G. Afonin A. N. Aleev E. N. Ardashev V. V. Avdeichikov V. P. Balandin S. G. Basiladze M. A. Batouritski S. F. Berezhnev G. A. Bogdanova Yu. T. Borzunov V. A. Budilov Yu. A. Chentsov V. F. Golovkin S. N. Golovnya S. A. Gorokhov N. I. Grishin Ya. V. Grishkevich G. G. Ermakov P. F. Ermolov N. F. Furmanets D. E. Karmanov A. V. Karpov G. D. Kekelidze V. I. Kireev A. A. Kiryakov A. G. Kholodenko E. S. Kokoulina V. V. Konstantinov V. N. Kramarenko A. V. Kubarovsky A. K. Kulikov E. A. Kuraev L. L. Kurchaninov A. Ya. Kutov N. A. Kuzmin G. I. Lanschikov A. K. Leflat I. S. Lobanov E. V. Lobanova S. I. Lyutov V. N. Lysan M. M. Merkin G. A. Mitrofanov V. V. Myalkovskiy V. A. Nikitin V. D. Peshehonov V. S. Petrov Y. P. Petukhov A. V. Pleskach M. K. Polkovnikov V. V. Popov V. N. Riadovikov V. N. Ronzhin I. A. Rufanov V. A. Senko N. A. Shalanda M. M. Soldatov V. I. Spiryakin A. V. Terletskiy L. A. Tikhonova Yu. P. Tsyupa A. M. Vishnevskaya V. Yu. Volkov A. P. Vorobiev A. G. Voronin V. I. Yakimchuk A. I. Yukaev V. N. Zapolskii N. K. Zhidkov S. A. Zotkin E. G. Zverev

hep-ex

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Neutral pion number N0 distributions for each total number of particles in event Ntot=Nch+N0 are obtained. The scaled variance of neutral pion fluctuations, omega=D/<N0>, is measured. The fluctuations increase at Ntot >22. According to quantum statistics models it may indicate for the approaching to pion condensate conditions for high pion multiplicity in the system.

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Neutral pion number fluctuations at high multiplicity in pp-interactions at 50 GeV

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