Linear regge trajectories and hadronic level degeneracy at high energies

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Abstract The statistical bootstrap condition for hadronic systems at rest implies an asymptotic density of states increasing exponentially in the total energy. We show that if for a given system the squared energies of all possible subsystems are constrained to lie on linear Regge trajectories, such a behaviour of the level density indeed follows. This result is then used to clarify common features of dual and statistical bootstrap approaches.