D-meson propagation in hadronic matter and consequences for heavy-flavor observables in ultrarelativistic heavy-ion collisions

Abstract : We employ recently published cross sections for D mesons with hadrons and calculate the drag and diffusion coefficients of D mesons in hadronic matter as a function of the momentum of D mesons as well as of the temperature of the medium. Calculating in our approach the spatial diffusion coefficient, D-x, at zero chemical potential we see a very smooth transition between our calculations for the hadron gas and the lattice QCD calculations. Applying the results for the transport coefficients of D mesons in a Fokker-Planck equation, which describes the evolution of D mesons during the expansion of a hadron gas created in ultrarelativistic heavy-ion collisions, we find that the value of R-AA is little influenced by hadronic rescattering, whereas in the elliptic flow the effects are stronger. We extend our calculations to the finite chemical potentials and calculate the spatial diffusion coefficients of D mesons propagating through the hadronic medium following isentropic trajectories, appropriate at future FAIR (Facility for Antiproton and Ion Research, Darmstadt) and NICA (Nuclotron-Based Ion Collider Facility, Dubna) heavy-ion experiments. For the isentropic trajectory with s/rho(net)(B) = 20 we find a perfect matching of results for D mesons in hadronic matter and for charm quarks in partonic matter treated within the dynamical quasiparticle model approach.
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https://hal-mines-nantes.archives-ouvertes.fr/hal-01204908
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Submitted on : Thursday, September 24, 2015 - 4:33:44 PM
Last modification on : Wednesday, February 13, 2019 - 11:28:02 AM

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V. Ozvenchuk, J. M. Torres-Rincon, Pol-Bernard Gossiaux, Jörg Aichelin, L. Tolos. D-meson propagation in hadronic matter and consequences for heavy-flavor observables in ultrarelativistic heavy-ion collisions. Physical Review C, American Physical Society, 2014, 90 (5), ⟨10.1103/PhysRevC.90.054909⟩. ⟨hal-01204908⟩

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