dorsal/arxiv
View SchemaHeavy-Quark Probes of the Quark-Gluon Plasma at RHIC
| Authors | Hendrik van Hees, Vincenzo Greco, Ralf Rapp |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0508055 |
| URL | https://arxiv.org/abs/nucl-th/0508055 |
| DOI | 10.1103/PhysRevC.73.034913 |
| Journal | Phys.Rev.C73:034913,2006 |
Abstract
Thermalization and collective flow of charm (c) and bottom (b) quarks in ultra-relativistic heavy-ion collisions are evaluated based on elastic parton rescattering in an expanding quark-gluon plasma (QGP). We show that resonant interactions in a strongly interacting QGP (sQGP), as well as the effects of parton coalescence, can play an essential role in the interpretation of recent data from the Relativistic Heavy-Ion Collider (RHIC), and thus illuminate the nature of the sQGP and its hadronization. Our main assumption, motivated by recent findings in lattice computations of Quantum Chromodynamics, is the existence of D- and B-meson states in the sQGP, providing resonant cross sections for heavy quarks up to temperatures of sim 2 T_c. Pertinent drag and diffusion coefficients are implemented into a relativistic Langevin simulation to compute transverse-momentum spectra and azimuthal asymmetries (v_2) of b- and c-quarks in Au-Au collisions at RHIC. Hadronization into D- and B-mesons is calculated from a combination of coalescence with light quarks and fragmentation, and associated electron-decay spectra and v_2 are compared to recent RHIC data. We also comment on the relative importance of radiative and elastic energy loss of heavy quarks in the QGP.
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"abstract": "Thermalization and collective flow of charm (c) and bottom (b) quarks in\nultra-relativistic heavy-ion collisions are evaluated based on elastic parton\nrescattering in an expanding quark-gluon plasma (QGP). We show that resonant\ninteractions in a strongly interacting QGP (sQGP), as well as the effects of\nparton coalescence, can play an essential role in the interpretation of recent\ndata from the Relativistic Heavy-Ion Collider (RHIC), and thus illuminate the\nnature of the sQGP and its hadronization. Our main assumption, motivated by\nrecent findings in lattice computations of Quantum Chromodynamics, is the\nexistence of D- and B-meson states in the sQGP, providing resonant cross\nsections for heavy quarks up to temperatures of sim 2 T_c. Pertinent drag and\ndiffusion coefficients are implemented into a relativistic Langevin simulation\nto compute transverse-momentum spectra and azimuthal asymmetries (v_2) of b-\nand c-quarks in Au-Au collisions at RHIC. Hadronization into D- and B-mesons is\ncalculated from a combination of coalescence with light quarks and\nfragmentation, and associated electron-decay spectra and v_2 are compared to\nrecent RHIC data. We also comment on the relative importance of radiative and\nelastic energy loss of heavy quarks in the QGP.",
"arxiv_id": "nucl-th/0508055",
"authors": [
"Hendrik van Hees",
"Vincenzo Greco",
"Ralf Rapp"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex"
],
"doi": "10.1103/PhysRevC.73.034913",
"journal_ref": "Phys.Rev.C73:034913,2006",
"title": "Heavy-Quark Probes of the Quark-Gluon Plasma at RHIC",
"url": "https://arxiv.org/abs/nucl-th/0508055"
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