The Origin of the Difference between Multiplicities in e+e- Annihilation and Heavy Ion Collisions

Details The Origin of the Difference between Multiplicities in e+e- Annihilation and Heavy Ion Collisions The Origin of the Difference between Multiplicities in e+e- Annihilation and Heavy Ion Collisions

2005-06-09

arxiv.org/abs/nucl-th/0506027v1

Physics

Nuclear Physics

Nuclear Theory

12 Pages, 4 Figures, Submitted to Physics Letters B

Scientific paper

Multiplicities in e+e- annihilation and relativistic heavy ion collisions show remarkable similarities at high energies. A thermal-statistical model is proposed to explain the differences which occur mainly at low beam energies. Two different calculations are performed, one using an approximate thermodynamic relationship, the other using a full thermal model code. The results are in qualitative agreement, suggesting that the interplay of baryon density and temperature tends to systematically suppress the total multiplicity at lower beam energies.

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