New Results from the H1 Collaboration

TL;DR

This paper presents new results from the H1 experiment at HERA, including the first measurement of the longitudinal proton structure function $F_L$, based on data collected over 15 years of operation.

Contribution

It reports the first measurement of the proton structure function $F_L$ using data from the H1 experiment after HERA's upgrade.

Findings

First measurement of $F_L$ at HERA.

Data collected over 15 years with 0.5 fb$^{-1}$ luminosity.

Results exploit post-upgrade data from 2000.

Abstract

After more than 15 years, the operation of the world's unique electron-proton collider HERA ended in June 2007. The data collected by the H1 experiment correspond to a total integrated luminosity of about 0.5 fb$^{-1}$. In 2007 dedicated runs were taken at lower proton beam energies to measure the longitudinal proton structure function $F_L$. In this talk new results, many of them exploiting data taken after the HERA upgrade in the year 2000, and the first measurement of $F_L$ are presented.