Abstract

A new preliminary measurement of the inclusive ep scattering cross section from H1 experiment at HERA is presented in the region of low four-momentum transfer squared, 12 GeV 2 < Q < 50 GeV and very high inelasticity, 0.75 < y < 0.9. The cross section in this kinematic domain is sensitive to the longitudinal structure function FL and thus provides additional constraints to the DGLAP evolution. The results are based on data collected in 2003-2006 (HERA-II). About equal luminosities obtained for ep and e−p collisions allow for a high precision control of background processes.

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