Measurement of Inclusive Jet Cross Sections in $Z/{\gamma }^{*}(\to e^{+}{e}^{-})+\mathrm{\text{jets}}$ Production in $p\overline{p}$ Collisions at $\sqrt{s}=1.96\mathrm{TeV}$

Inclusive jet cross sections in $Z/{\gamma }^{*}$ events, with $Z/{\gamma }^{*}$ decaying into an electron-positron pair, are measured as a function of jet transverse momentum and jet multiplicity in $p\overline{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$ with the upgraded Collider Detector at Fermilab in run II, based on an integrated luminosity of $1.7\mathrm{f}{\mathrm{b}}^{-1}$. The measurements cover the rapidity region $|y^{\mathrm{jet}}|<2.1$ and the transverse momentum range $p_T^{\mathrm{jet}}>30\mathrm{GeV}/c$. Next-to-leading order perturbative QCD predictions are in good agreement with the measured cross sections.

Figure 1

(a) Measured inclusive jet differential cross section as a function of $p_T^{\mathrm{jet}}$ (black dots) in $Z/{\gamma }^{*}(\to e^{+}{e}^{-})+\mathrm{\text{jets}}$ with $N_{\mathrm{jet}}\ge 1,2$ compared to NLO pQCD predictions (open circles). For clarity, the measurement for $N_{\mathrm{jet}}\ge 1$ is scaled up ($\times 20$). The shaded bands show the total systematic uncertainty, except for the $5.8\%$ luminosity uncertainty. (b) and (c) Data/theory ratio as a function of $p_T^{\mathrm{jet}}$ for $N_{\mathrm{jet}}\ge 1$ and $N_{\mathrm{jet}}\ge 2$, respectively. The dashed and dotted lines indicate the PDF uncertainty and the variation with $\mu$ of the NLO pQCD predictions, respectively.

Figure 2

(a) Measured cross section for inclusive jet production in $Z/{\gamma }^{*}(\to e^{+}{e}^{-})$ events as a function of $N_{\mathrm{jet}}$ compared to LO and NLO pQCD predictions. The shaded bands show the total systematic uncertainty, except for the $5.8\%$ luminosity uncertainty. (b) Ratio of data and NLO to LO pQCD predictions versus $N_{\mathrm{jet}}$. The dashed and dotted lines indicate the PDF uncertainty and the variation with $\mu$ of the NLO pQCD predictions, respectively.