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arXiv · 1007.4170

Heavy-quark Langevin dynamics and single-electron spectra in nucleus-nucleus collision

W. M. Alberico·A. Beraudo·A. De Pace·A. Molinari·M. Monteno·M. Nardi·F. Prino
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Abstract

The stochastic dynamics of heavy quarks in the fireball produced in heavy-ion collisions is followed through numerical simulations based on the Langevin equation. The modification of the final p_T spectra (R_AA) of c and b quarks, hadrons and single-electrons with respect to pp collisions is studied. The transport coefficients are evaluated treating separately the contribution of soft and hard collisions. The initial heavy-quark spectra are generated according to NLO-pQCD, accounting for nuclear effects through recent nPDFs. The evolution of the medium is obtained from the output of two hydro-codes (ideal and viscous). The heavy-quark fragmentation into hadrons and their final semileptonic decays are implemented according to up to date experimental data. A comparison with RHIC data for non-photonic electron spectra is given.

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W. M. Alberico, A. Beraudo, A. De Pace, A. Molinari, M. Monteno, M. Nardi, F. Prino. 2010-07-23. Heavy-quark Langevin dynamics and single-electron spectra in nucleus-nucleus collision. https://doi.org/10.1088/1742-6596%2F270%2F1%2F012029

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