Distributions of Charged Hadrons Associated with High Transverse Momentum Particles inppandAu+AuCollisions atsNN=200 GeV

Charged hadrons in $0.15<{p}_{\ensuremath{\perp}}<4\text{ }\text{ }\mathrm{GeV}/c$ associated with particles of ${p}_{\ensuremath{\perp}}^{\mathrm{trig}}>4\text{ }\text{ }\mathrm{GeV}/c$ are reconstructed in $pp$ and $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$. The associated multiplicity and ${p}_{\ensuremath{\perp}}$ magnitude sum are found to increase from $pp$ to central $\mathrm{Au}+\mathrm{Au}$ collisions. The associated ${p}_{\ensuremath{\perp}}$ distributions, while similar in shape on the nearside, are significantly softened on the awayside in central $\mathrm{Au}+\mathrm{Au}$ relative to $pp$ and not much harder than that of inclusive hadrons. The results, consistent with jet quenching, suggest that the awayside fragments approach equilibration with the medium traversed.

Distributions of Charged Hadrons Associated with High Transverse Momentum Particles inppandAu+AuCollisions atsNN=200 GeV | Litlas