Jet quenching and azimuthal anisotropy of large p(T) spectra in noncentral high-energy heavy ion collisions
Aug, 20009 pages
Published in:
- Phys.Rev.C 63 (2001) 054902
e-Print:
- nucl-th/0009019 [nucl-th]
Report number:
- LBNL-46795
Citations per year
Abstract: (arXiv)
Parton energy loss inside a dense medium leads to the suppression of large hadrons and can also cause azimuthal anisotropy of hadron spectra at large transverse momentum in non-central high-energy heavy-ion collisions. Such azimuthal anisotropy is studied qualitatively in a parton model for heavy-ion collisions at the RHIC energies. The coefficient of the elliptic anisotropy at large is found to be very sensitive to parton energy loss. It decreases slowly with contrary to its low behavior where increases very rapidly with . The turning point signals the onset of contributions of hard processes and the magnitude of parton energy loss. The centrality dependence of is shown to be sensitive to both size and density dependence of the parton energy loss and the later can also be studied via variation of the colliding energy. The anisotropy coefficient normalized by the spatial ellipticity is found to decrease significantly toward semi-peripheral collisions, differing from the hydrodynamic results for low hadrons. Constrained by the existing WA98 experimental data at the SPS energy on parton energy loss, both hadron spectra suppression and azimuthal anisotropy at high are predicted to vanish for 7-8 fm in collisions at 130-200 GeV when the hadron rapidity density per unit area of the initial overlapped region is less than what is achieved in the central collisions at the SPS energy.Note:
- 9 pages in RevTex, 10 figures
- p p: inclusive reaction
- nucleus nucleus: inclusive reaction
- scattering: heavy ion
- quantum chromodynamics: perturbation theory
- hadron: hadroproduction
- model: parton
- jet: quenching
- transverse momentum: spectrum
- matter: hadronic
- impact parameter
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