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Title: J/PSI AND PST SUPPRESSION IN P-A COLLISIONS AT 800 GEV/C

Abstract

No abstract prepared.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., Los Alamos, NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
785175
Report Number(s):
LA-UR-99-3572
TRN: US0200028
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Jul 1999
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOM COLLISIONS; ATOMIC PHYSICS; GEV RANGE 100-1000

Citation Formats

M. LEITCH, W. LEE, and ET AL. J/PSI AND PST SUPPRESSION IN P-A COLLISIONS AT 800 GEV/C. United States: N. p., 1999. Web.
M. LEITCH, W. LEE, & ET AL. J/PSI AND PST SUPPRESSION IN P-A COLLISIONS AT 800 GEV/C. United States.
M. LEITCH, W. LEE, and ET AL. 1999. "J/PSI AND PST SUPPRESSION IN P-A COLLISIONS AT 800 GEV/C". United States. doi:. https://www.osti.gov/servlets/purl/785175.
@article{osti_785175,
title = {J/PSI AND PST SUPPRESSION IN P-A COLLISIONS AT 800 GEV/C},
author = {M. LEITCH and W. LEE and ET AL},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month = 7
}

Conference:
Other availability
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  • The hadron production of [ital J]/[psi], [psi][prime], and [Upsilon] on nuclear targets shows two initial state'' effects: a modification of the structure functions in nuclei leads a reduced production relative to [ital p][minus][ital p] interactions, and parton scattering in nuclear matter broadens the transverse momentum spectrum in comparison to that in [ital p][minus][ital p] collisions. If charmonium or bottonium states are to be used as probes for the nature of dense matter formed in nucleus-nucleus collisions, both these effects must first be taken into account. We do this and discuss the resulting final state features of [ital J]/[psi] and [psi][prime]more » production in high energy heavy ion experiments.« less
  • The observed features of {psi}` to J/{psi} suppression in pA and nucleus-nucleus collisions can be explained in terms of a two-component absorption model. For the hard component of the absorption due to the interaction of the produced c{bar c} systems with baryons at high relative energies, the absorption cross sections are insensitive to the radii of the c{bar c} systems, as described by the Additive Quark Model. For the soft component due to the low energy c{bar c} interactions with soft particles produced by other baryon-baryon collisions, the absorption cross sections are greater for {psi}` than for J/{psi}, because themore » breakup threshold for {psi}` is much smaller than for {psi}.« less
  • The anomalous suppression of J/{psi} production in Pb-Pb collisions at 158 GeV observed by the NA50 Collaboration can be explained as due to the occurrence of a new phase of strong J/{psi} absorption, which sets in when the local energy density exceeds about 3.4 GeV/fm{sup 3}. The peculiar behavior of the {psi}{sup `}/{psi} ratio in {ital p}-A and nucleus-nucleus collisions can be understood as due to approximately equal {psi}-N and {psi}{sup `}-N absorption cross sections, but greater absorption cross sections for {psi}{sup `} than J/{psi} with regard to absorption by soft particles and matter in the new phase.
  • Measurements of {psi} and {psi}{prime} production from experiment NA50 at the CERN SPS are compared to calculations based on a hadronic model of charmonium suppression developed previously. Data on centrality dependence and total cross sections are in good accord with these predictions. Uncertainties in theoretical quantities such as NA50`s L parameter are discussed.
  • Measurements of {psi} and {psi}{prime} production at the CERN SPS are compared to predictions based on a hadronic model of charmonium suppression. Detailed information is presented to facilitate comparison to other analyses. Sensitivity of these conclusions to model parameters is discussed.