https://doi.org/10.1140/epjc/s2003-01262-9
experimental physics
Measurement of inclusive jet cross sections in photoproduction at HERA
Abstract
Inclusive jet cross sections are measured in photoproduction at HERA using the H1 detector. The data sample of $e^+ p \rightarrow e^+ + jet + X$ events in the kinematic range of photon virtualities $Q^2 \leq 1 \mathrm{GeV}^2$ and photon-proton centre-of-mass energies $95 \leq W_{\gamma p} \leq 285 \mathrm{GeV}$ represents an integrated luminosity of $24.1 \mathrm{pb}^{-1}$. Jets are defined using the inclusive $k_{\bot}$ algorithm. Single- and multi-differential cross sections are measured as functions of jet transverse energy E T jet and pseudorapidity $\eta^{ jet}$ in the domain $5 \leq E_T^{ jet} \leq 75 \mathrm{GeV}$ and $-1 \leq \eta^{ jet} \leq 2.5$. The cross sections are found to be in good agreement with next-to-leading order perturbative QCD calculations corrected for fragmentation and underlying event effects. The cross section differential in E T jet , which varies by six orders of magnitude over the measured range, is compared with similar distributions from $p \overline{p}$ colliders at equal and higher energies.
© Springer-Verlag, 2003
