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  • 2000-2004  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Charmonium production from secondary collisions at LHC energy (2000)
    Springer
    The European physical journal 16 (2000), S. 519-525 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We consider the charmonium production in the thermalized hadronic medium created in ultrarelativistic heavy ion collisions at LHC energy. The calculations for secondary $J/\psi$ and $\psi^{\prime}$ production by $D\bar D$ annihilation are performed within a kinetic model taking into account the space-time evolution of a longitudinally and transversely expanding medium. We show that secondary charmonium production appears almost entirely during the mixed phase, and that it is very sensitive to the charmonium dissociation cross section with co-moving hadrons. Within the most likely scenario for the dissociation cross section of the $J/\psi$ mesons their regeneration in the hadronic medium will be negligible. The secondary production of $\psi^{\prime}$ mesons however, due to their large cross section above the threshold, can substantially exceed the primary yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520000356
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Strangeness production in nuclear matter and expansion dynamics (2003)
    Springer
    The European physical journal 32 (2003), S. 399-415 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Thermodynamical properties of hot and dense nuclear matter are analyzed and compared for different equations of state (EoS). It is argued that the softest point of the equation of state and the strangeness separation on the phase boundary can manifest themselves in observables. The influence of the EoS and the order of the phase transition on the expansion dynamics of nuclear matter and strangeness excitation function is analyzed. It is shown that the bulk properties of the strangeness production in A-A collisions depend only weakly on the particular form of the EoS. The predictions of different models are related with experimental data on strangeness production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2003-01374-2
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Photoproduction constraints on $J/\psi$ -nucleon interactions (2000)
    Springer
    The European physical journal 17 (2000), S. 461-465 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Using $J/\psi$ and open charm photoproduction data, we apply the vector meson dominance model to obtain constraints on the energy dependence of the inelastic $J/\psi$ -nucleon cross section. Predictions of short distance QCD are in accord with these constraints, while recently proposed hadronic models for $J/\psi$ dissociation strongly violate them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520000488
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Hadron resonance mass spectrum and lattice QCD thermodynamics (2003)
    Springer
    The European physical journal 29 (2003), S. 549-556 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We confront lattice QCD results on the transition from the hadronic phase to the quark-gluon plasma with hadron resonance gas and percolation models. We argue that for $T\leq T_{\mathrm{c}}$ the equation of state derived from Monte Carlo simulations of (2+1) quark-flavor QCD can be well described by a hadron resonance gas. We examine the quark mass dependence of the hadron spectrum on the lattice and discuss its description in terms of the MIT bag model. This is used to formulate a resonance gas model for arbitrary quark masses which can be compared to lattice calculations. We finally apply this model to the analysis of the quark mass dependence of the critical temperature obtained in lattice calculations. We show that the value of $T_{\mathrm{c}}$ for different quark masses agrees with lines of constant energy density in a hadron resonance gas. For large quark masses a corresponding contribution from a glueball resonance gas is required.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2003-01228-y
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    Paper (German National Licenses)
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