Eur Phys J C (2004) 33: s416-s418
https://doi.org/10.1140/epjcd/s2004-03-1654-0

PS04 Hard QCD

Measurements of event and jet shapes at HERA

I. Physikalisches Institut, RWTH Aachen, D-52056 Aachen, Germany

Received: 31 October 2003
Accepted: 7 January 2004
Published online: 11 February 2004

Abstract

Event shapes and jet shapes in neutral current deep inelastic scattering and photoproduction are studied with the H1 and ZEUS detectors at HERA. The measurements are compared to next-to-leading-order QCD calculations and Monte Carlo models. The strong coupling constant is determined from subjet multiplicities.