New QCD Results from the H1 Experiment at HERA

TL;DR

This paper summarizes new QCD measurements from the H1 experiment at HERA, including structure functions, jet production, and strong coupling constant, based on extensive electron-proton collision data from 1994 to 2007.

Contribution

It provides the first direct measurement of the longitudinal structure function and precise determinations of QCD parameters using HERA I and II data.

Findings

Direct measurement of F_L obtained.

Precise determination of alpha_s.

Observation of heavy quark production and diffractive jets.

Abstract

New QCD results obtained by the H1 Collaboration are summarized. These results are based on data taken in $e^{\pm}p$ collisions at HERA I (1994-2002) and HERA II (2003-2007) corresponding to an integrated luminosity of almost $\rm 0.5 fb^{-1}$. The data were taken at an electron {Electron means electron and positron.} beam energy of $E_{e}=27.5$ GeV and proton beam energies of $\rm E_{p}=820 GeV, 920 GeV, 575 GeV$ and $\rm 460 GeV$. A direct measurement of $F_{L}$, jet production and measurement of $\alpha_{s}$, production of heavy quarks and diffractive photo-production of jets are presented.