Neutral pion number fluctuations at high multiplicity in pp-interactions   at 50 GeV
  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. 
SVD-2 Collaboration: A.G. Afonin, A.N. Aleev, E.N. Ardashev, V.V.   Avdeichikov, V.P. Balandin, S.G. Basiladze, M.A. Batouri...
hep-ex