| Measured (left) particle density, and (right) $\Sigma \pt$ density, in the transverse region relative to the leading charged-particle jet in the event ($\abs{\eta}<2$, $60\de < \abs{\Delta \varphi} < 120\de $), as a function $\jetpt$. The data (symbols) are compared to various MC simulations (curves). The ratios of MC simulations to the measurements are shown in the bottom panels. The inner error bars correspond to the statistical uncertainties, and the outer error bars represent the statistical and systematic uncertainties added in quadrature. |