Measurement of the Charm and Beauty Structure Functions using the H1 Vertex Detector at HERA

TL;DR

This paper reports measurements of charm and beauty quark structure functions in electron-proton collisions at HERA, using the H1 vertex detector to identify heavy flavor events and compare results with QCD predictions.

Contribution

It presents new measurements of charm and beauty structure functions in a broad kinematic range, utilizing vertex detector techniques and combining data with previous results.

Findings

Measured charm and beauty cross sections in specified Q^2 and x ranges.

Compared experimental data with QCD theoretical predictions.

Enhanced understanding of heavy flavor production in ep collisions.

Abstract

Inclusive charm and beauty cross sections are measured in e-p and e+p neutral current collisions at HERA in the kinematic region of photon virtuality 5<Q^2<2000 GeV^2 and Bjorken scaling variable 0.0002<x<0.05. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb^-1. The numbers of charm and beauty events are determined using variables reconstructed by the H1 vertex detector including the impact parameter of tracks to the primary vertex and the position of the secondary vertex. The measurements are combined with previous data and compared to QCD predictions.