New Structure Function Results at Low x and High Q^2 from HERA

TL;DR

This paper presents precise measurements of the proton structure function F_2 at low x and high Q^2 from HERA, including gluon density extraction, charm contribution, and cross-section comparisons with Standard Model predictions.

Contribution

It provides new high-precision data on F_2, gluon density, and charm contribution at low x and high Q^2, enhancing understanding of proton structure and QCD.

Findings

F_2 measured precisely at low x and high Q^2

Gluon density xg extracted from data

Charm contribution to F_2 determined in extended kinematic range

Abstract

A precise proton structure function F_2 at low x is measured. The data is interpreted in the framework of QCD with an extraction of gluon density xg. The charm contribution to F_2 is determined in an extended kinematic range. Neutral and charged current cross-sections at high Q^2 are also measured and compared with the Standard Model predictions.