Hadron production from resonance decay in relativistic collisions

Details Hadron production from resonance decay in relativistic collisions Hadron production from resonance decay in relativistic collisions

2005-05-17

arxiv.org/abs/nucl-th/0505049v2

Phys.Lett. B627 (2005) 55-63

Physics

Nuclear Physics

Nuclear Theory

Revtex, 15 pages, 5 figs, Version to appear in PLB

Scientific paper

10.1016/j.physletb.2005.08.121

A statistical model for decay and formation of heavy hadronic resonances is formulated. The resonance properties become increasingly uncertain with increasing resonance mass. Drawing on analogy with the situation in low-energy nuclear physics, we employ the Weisskopf approach to the resonance processes. In the large-mass limit, the density of resonance states in mass is governed by a universal Hagedorn-like temperature T_H. As resonances decay, progressively more and more numerous lighter states get populated. For T_H \simeq 170 MeV, the model describes data for the hadron yield ratios at the RHIC and SPS energies under the extreme assumption of a single heavy resonance giving rise to measured yields.

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