Measurements of inclusive jet spectra in pp and central Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV

This article reports measurements of the $p_{\rm T}$-differential inclusive jet cross section in pp collisions at $\sqrt{s}$ = 5.02 TeV and the $p_{\rm T}$-differential inclusive jet yield in Pb-Pb 0–10% central collisions at $\sqrt{s_{\rm NN}}$ = 5.02TeV. Jets were reconstructed at midrapidity with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm. For pp collisions, we report jet cross sections for jet resolution parameters R = 0.1–0.6 over the range $20 < p_{\rm T,jet} < 140$ GeV/c, as well as the jet cross-section ratios of different R and comparisons to two next-to-leading-order (NLO)–based theoretical predictions. For Pb-Pb collisions, we report the R = 0.2 and R = 0.4 jet spectra for $40 < p_{\rm T,jet} < 140$ GeV/c and $60 < p_{\rm T,jet} < 140$ GeV/c, respectively. The scaled ratio of jet yields observed in Pb-Pb to pp collisions, $R_{\rm AA}$, is constructed, and exhibits strong jet quenching and a clear $p_{\rm T}$ dependence for R = 0.2. No significant R dependence of the jet $R_{\rm AA}$ is observed within the uncertainties of the measurement. These results are compared to several theoretical predictions