Di-jet event rates in deep-inelastic scattering at HERA
The H1 Collaboration
C. Adloff35 - et al.
Received: 2 March 1999 / Revised version: 24 July 1999 /
Published online: 28 September 1999 - © Springer-Verlag 2000
Di-jet event rates have been measured for deep-inelastic scattering in the kinematic domain
5 Q2 and 10-4 10-2, and for jet transverse momenta squared pt*2 Q2. The analysis is based on data collected with the H1 detector at HERA in 1994 corresponding to an integrated luminosity of about 2 pb-1. Jets are defined using a cone algorithm in the photon-proton centre of mass system requiring jet transverse momenta of at least 5 GeV. The di-jet event rates are shown as a function of Q2 and . Leading order models of point-like interacting photons fail to describe the data. Models which add resolved interacting photons or which implement the colour dipole model give a good description of the di-jet event rate. This is also the case for next-to-leading order calculations including contributions from direct and resolved photons.
Copyright Società Italiana di Fisica, Springer-Verlag 2000