Fractional Energy Loss and Centrality Scaling

Abstract

The phenomenon of centrality scaling in the high-\pt spectra of ${\pi }^0$ produced in Au-Au collisions at $\sqrt{s}=200$ GeV is examined in the framework of relating fractional energy loss to fractional centrality increase. A new scaling behavior is found where the scaling variable is given a power-law dependence on $N_{\mathrm{part}}$. The exponent $\gamma$ specifies the fractional proportionality relationship between energy loss and centrality, and is a phenomenologically determined number that characterizes the nuclear suppression effect. The implication on the parton energy loss in the context of recombination is discussed.

arXiv comment4 pages in RevTeX

References in corpus (19)

• Suppression of Hadrons with Large Transverse Momentum in Central Au+Au Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV
• Transverse momentum and collision energy dependence of high $p_T$ hadron suppression in Au+Au collisions at ultrarelativistic energies
• Hadronization in heavy ion collisions: Recombination and fragmentation of partons
• Disappearance of back-to-back high $p_T$ hadron correlations in central Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Parton coalescence and antiproton/pion anomaly at RHIC
• Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase
• Centrality dependence of high pT hadron suppression in Au+Au collisions at sqrt(sNN)=130 GeV
• Elliptic flow at large transverse momenta from quark coalescence
• Suppressed pi^0 Production at Large Transverse Momentum in Central Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Parton coalescence at RHIC
• Quenching of hadron spectra in media
• Scaling behavior at high p_T and the p/pi ratio
• Why the observed jet quenching at RHIC is due to parton energy loss
• Inclusive Distributions for Hadronic Collisions in the Valon-Recombination Model
• Scaling Distributions of Quarks, Mesons and Proton for all $p_T$, Energy and Centrality
• Results on Identified Hadrons from the PHENIX Experiment at RHIC
• Centrality Scaling of the $p_T$ Distribution of Pions
• Meson and baryon elliptic flow at high pT from parton coalescence
• High-p_T pi^0 suppression in Au+Au collisions at sqrt(s_NN) = 200 GeV

Cited by in corpus (4)

• De-Confinement and Clustering of Color Sources in Nuclear Collisions
• Universal behavior of baryons and mesons transverse momentum distributions in the framework of percolation of strings
• Universality of scaled particle spectra in ultrarelativistic heavy-ion collisions
• Correlations at intermediate $p_T$