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

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 pT spectra (RAA) of c and b quarks, hadrons and single-electrons with respect to pp collisions is studied....

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Bibliographic Details
Published in:Journal of physics. Conference series 2011-01, Vol.270 (1), p.012029-4
Main Authors: Beraudo, A, Alberico, W M, De Pace, A, Molinari, A, Monteno, M, Nardi, M, Prino, F
Format: Article
Language:English
Subjects:
Accounting
Collisions
Dynamics
Evolution
Fireballs
Hadrons
Heavy ions
Ionic collisions
Mathematical analysis
Mathematical models
Nuclei (nuclear physics)
Physics
Quarks
Relativistic Heavy Ion Collider
Single electrons
Spectra
Transport properties
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Summary: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 pT spectra (RAA) 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.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/270/1/012029