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Net Charge and Isospin Fluctuations in the World of Elementary Particles

Vesna Mikuta-Martinis

nucl-tharXiv:nucl-th/0412007

Abstract

Charge and isospin event-by-event fluctuations in high-energy pp-collisions are predicted within the Unitary Eikonal Model ( UEM), in particular the fluctuation patterns of the ratios of charged-to-charged and neutral-to-charged pions. These fluctuations are found to be sensitive to the presence of unstable resonances, such as ρ and ω mesons.We predict that the charge-fluctuation observable DUEM should be restricted to the interval 8/3 DUEM 4 depending on the ρ/π production ratio.This result is shown to be compatible with the formation of a hadron gas at RHIC and SPS energies.

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