Evidence of finite sQGP formation time at RHIC
arXiv:hep-ph/0604268
Abstract
We demonstrate that the existence of a finite formation time of strongly interacting plasma in nuclear collisions at RHIC is an inavitable conclusion from recent experimental data. The most striking feature of the experimental data - an absense of absorption of high transverse momentum pions in the rection plane direction for mid-peripheral collisions - points to the presence of a surface zone with no absorption and strong suppression in the inner core. A natural interpretation of such a zone should be the plasma formation time T= 2-3 fm/c. We discuss constraints induced by finite formation time on some physical observables at RHIC. Nuclear modification factor, azimuthal assymetry, di-jet correlations can quantitatively be described by particle production in the early stage of the nuclear collision. A possible impact on azimuthal anisotropy at lower hardon momenta, on interpretation of the non-photonic electrons and J/psi data is also considered.
arXiv comment8 pages including 5 figures. Proceedings of the 22nd Winter Workshop on Nuclear Dynamics, La Jolla, California, March 11-18, 2006
References in corpus (4)
- Ionization of Binary Bound States in a Strongly Coupled Quark-Gluon Plasma
- PHENIX Results on Open Heavy Flavor Production and Flow in Au + Au Collisions at sqrt(s_NN) = 200 GeV
- High-pT pi0, eta, Identified and Inclusive Charged Hadron Spectra from PHENIX
- Constraints induced by finite plasma formation time on some physical observables at RHIC