Deep inelastic cross-section measurements at large y with the ZEUS detector at HERA

摘要

The reduced cross sections for ${e}^{+}p$ deep inelastic scattering have been measured with the ZEUS detector at HERA at three different center-of-mass energies, 318, 251 and 225 GeV. The cross sections, measured double differentially in Bjorken $x$ and the virtuality, ${Q}^{2}$, were obtained in the region $0.13\le y\le 0.75$, where $y$ denotes the inelasticity and $5\le {Q}^{2}\le 110\text{}\text{}{\mathrm{GeV}}^{2}$. The proton structure functions ${F}_{2}$ and ${F}_{L}$ were extracted from the measured cross sections.