$D$-mesons propagation in hadronic matter and consequences on heavy-flavor observables in ultrarelativistic heavy-ion collisions
| Autor: | Ozvenchuk, Vitalii, Torres-Rincon, Juan M., Gossiaux, Pol B., Tolos, Laura, Aichelin, Joerg |
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| Rok vydání: | 2014 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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 and NICA heavy-ion experiments. For the isentropic trajectory with $s/\rho_B^{\rm net}=20$ we find a perfect matching of results for $D$-mesons in hadronic matter and for charm quarks in partonic matter treated within the DQPM approach. Comment: 10 pages, 8 figures |
| Databáze: | arXiv |
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