Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-09-10
PoS CPOD07:047,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
Proceedings of 4th International Workshop Critical Point and Onset of Deconfinement, July 9 - 13, 2007, Darmstadt, Germany
Scientific paper
Particle number fluctuations are studied in the ideal pion gas approaching Bose-Einstein condensation. Two different cases are considered: Bose condensation of pions at large charge densities $\rho_Q$ and Bose condensation at large total densities of pions $\rho_{\pi}$. Calculations are done in grand canonical, canonical and microcanonical ensembles. At high collision energy, in the samples of events with a fixed number of all pions, $N_{\pi}$, one may observe a prominent signal. When $N_{\pi}$ increases the scaled variances for particle number fluctuations of both neutral and charged pions increase dramatically in the vicinity of the Bose-Einstein condensation line. As an example, the estimates are presented for $p+p$ collisions at the beam energy of 70 GeV.
Begun Viktor V.
Gorenstein Mark
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