Transverse Momentum Dependence of Anomalous J/ψSuppression in Pb-Pb Collisions

Details Transverse Momentum Dependence of Anomalous J/ψSuppression in Pb-Pb Collisions Transverse Momentum Dependence of Anomalous J/ψSuppression in Pb-Pb Collisions

2001-04-26

arxiv.org/abs/nucl-th/0104078v3

Phys.Lett. B515 (2001) 115-120

Physics

Nuclear Physics

Nuclear Theory

10 pages and 3 figures

Scientific paper

10.1016/S0370-2693(01)00864-4

The recently published data for $$ for $J/\psi$ production in Pb-Pb collisions at 158 A GeV are analyzed. For low values of transverse energy $E_t$, where normal suppression dominates, $ (E_t)$ scales with the path length of the gluons which fuse to make the $J/\psi$. In the $E_t$ domain of anomalous suppression $ (E_t)$ is found to rise linearly with the relative amount of anomalous suppression. This empirical law is reproduced within an analytically solvable transport model which allows high $p_t$ $J/\psi$'s to escape anomalous suppression. Interpreted in this way, the data for $ (E_t)$ lead to an estimate of $t_A \sim 4$ fm/$c$ for the duration of anomalous suppression.

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