Dissociation rates of J / psi's with comoving mesons : thermal versus nonequilibrium scenario.

  • We study J/psi dissociation processes in hadronic environments. The validity of a thermal meson gas ansatz is tested by confronting it with an alternative, nonequilibrium scenario. Heavy ion collisions are simulated in the frame- work of the microscopic transport model UrQMD, taking into account the production of charmonium states through hard parton-parton interactions and subsequent rescattering with hadrons. The thermal gas and microscopic transport scenarios are shown to be very dissimilar. Estimates of J/psi survival probabilities based on thermal models of comover interactions in heavy ion collisions are therefore not reliable.

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Author:Christian Spieles, Ramona VogtORCiD, Lars GerlandGND, Steffen A. BassORCiDGND, Marcus BleicherORCiDGND, Horst StöckerORCiDGND, Walter GreinerGND
Document Type:Preprint
Date of Publication (online):2005/12/08
Year of first Publication:1998
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/12/08
Tag:Kollisionen schwerer Ionen; Meson; Molekulare Dynamik; UrQMD; ultrarelativistisch
Meson; Ultrarelativistic Quantum Molecular Dynamics; UrQMD; heavy ion collisions
Source:Report-no: LBNL-42280 ; Journal-ref: J.Phys. G25 (1999) 2351-2359 ; http://www.arxiv.org/abs/hep-ph/9809441
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht