Measurement of charged particle spectra in deep-inelastic ep scattering at HERA

Abstract

Charged particle production in deep-inelastic ep scattering is measured with the H1 detector at HERA. The kinematic range of the analysis covers low photon virtualities, 5 < Q(2) < 100 GeV2, and small values of Bjorken-x, 10(-4) < x < 10(-2).

The analysis is performed in the hadronic centre-of-mass system. The charged particle densities are measured as a function of pseudorapidity (n(*)) and transverse momentum (p(T)(*)) in the range 0 < n(*) < 5 and 0 < p(T)(*) < 10 GeV in bins of x and Q(2).

The data are compared to predictions from different Monte Carlo generators implementing various options for hadronisation and parton evolutions.

Keywords

• lead/scintillating-fiber calorimeter
• liquid argon calorimeter
• carlo generator cascade
• transverse energy-flow
• color dipole model
• parton distributions
• perturbation-theory
• jet production
• h1 detector
• small-x