Abstract
Calculations and predictions are presented within the framework of the statistical hadronization model for transverse momentum spectra of the charmonium states J/ψ, ψ(2S) and X(3872) produced in nucleus-nucleus collisions at LHC energies. The results are confronted with available data and exhibit very good agreement by using particle flow profiles from state-of-the-art hydrodynamic calculations. For X(3872) production in Pb–Pb collisions we predict a transverse momentum distribution similar in shape to that for J/ψ with a strong enhancement at low transverse momenta and a production yield of about 1% relative to that for J/ψ.
Highlights
Ultra-relativistic heavy-ion collisions are widely used to investigate the evolution from the hot and dense phase of QCD with quarks and gluons as degrees of freedom, the quark-gluon plasma (QGP), towards hadronization into color-neutral objects as degrees of freedom
In the present publication we focus on charmonium states
We present calculations for the yields and transverse momentum spectra of the charmonium sattat√essNJN/ψ=, ψ(2S), 5 TeV
Summary
Ultra-relativistic heavy-ion collisions are widely used to investigate the evolution from the hot and dense phase of QCD with quarks and gluons as degrees of freedom, the quark-gluon plasma (QGP), towards hadronization into color-neutral objects as degrees of freedom. The underlying assumption is that at the latest at hadronization the fireball formed in such collisions is close to thermal equilibrium such that hadron yields can be characterized by a grand canonical partition function where baryon number, the 3-component of the isospin, and strangeness are conserved on average and a rapid hadrochemical freeze-out takes place at the phase boundary. These assumptions connect the microscopic content of a heavy-ion collision with macroscopic at-. X(3872) for heavy-ion collisions Results will be presented for the current collision system Pb–Pb and, in the case of X(3872), for Kr–Kr collisions where much larger luminosities are possible at the LHC
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