Conference paper

Editor list: Faessler, A

Publication year: 2004

Pages: 211-223

Journal: Progress in Particle and Nuclear Physics

Volume number: 53

Issue number: 1

ISSN: 0146-6410

ISBN: *************

Open access status: Green

DOI Link: https://doi.org/10.1016/j.ppnp.2004.02.006

Conference: International School of Nuclear Physics

Publisher: Elsevier

Title of series: Progress in Particle and Nuclear Physics

Abstract: 
We investigate hadron production and attenuation of hadrons with strange and charm quarks (or antiquarks) as well as high transverse momentum hadrons in relativistic nucleus-nucleus collisions from 2 A GeV to 21.3 A TeV within two independent transport approaches (UrQMD and HSD). Both transport models are based on quark, diquark, string and hadronic, degrees of freedom, but do not include any explicit phase transition to a quark-gluon plasma. From our dynamical calculations we find that both models do not describe the maximum in the K+/pi(+) ratio at 20-30 A GeV in central Au + Au collisions found experimentally, though the excitation functions of strange mesons are reproduced well in HSD and UrQMD. Furthermore, the transport calculations show that the charmonium recreation by D + (D) over bar --> J/Psi + meson reactions is comparable to the dissociation by 'comoving' mesons at RHIC energies contrary to SPS energies. This leads to the final result that the total J/Psi suppression as a function of centrality at RHIC should be less than the suppression seen at SPS energies where the 'comover' dissociation is substantial and the backward channels play no role. Furthermore, our transport calculations-in comparison to experimental data on transverse momentum spectra from pp, d + Au and Au + Au reactions-show that pre-hadronic effects are responsible for both the hardening of the hadron spectra for low transverse momenta (Cronin effect) as well as the suppression of high PT hadrons. The mutual interactions of formed hadrons are found to be negligible in central Au + Au collisions at roots = 200 GeV for p(T) greater than or equal to 6 GeV/c and the sizeable suppression seen experimentally is attributed to a large extent to the interactions of 'leading' pre-hadrons with the dense environment. (C) 2004 Elsevier B.V. All rights reserved.

Harvard Citation style: Cassing, W., Gallmeister, K., Bratkovskaya, E., Greiner, C. and Stöcker, H. (2004) Dynamics of strange, charm and high momentum hadrons in relativistic nucleus-nucleus collisions, Progress in Particle and Nuclear Physics, 53(1), pp. 211-223. https://doi.org/10.1016/j.ppnp.2004.02.006

APA Citation style: Cassing, W., Gallmeister, K., Bratkovskaya, E., Greiner, C., & Stöcker, H. (2004). Dynamics of strange, charm and high momentum hadrons in relativistic nucleus-nucleus collisions. Progress in Particle and Nuclear Physics. 53(1), 211-223. https://doi.org/10.1016/j.ppnp.2004.02.006