Measurement of jet shapes in high-Q2 deep inelastic scattering at HERA
The ZEUS Collaboration
J. Breitweg - et al.
Received: 2 April 1998 / Published online: 15 April 1999
The shapes of jets with transverse energies, , up to 45GeV produced in neutral- and charged-current deep inelastic e+p scattering (DIS) at Q2 > 100GeV2 have been measured with the ZEUS detector at HERA. Jets are identified using a cone algorithm in the plane with a cone radius of one unit. The jets become narrower as increases. The jet shapes in neutral- and charged-current DIS are found to be very similar. The jets in neutral-current DIS are narrower than those in resolved processes in photoproduction and closer to those in direct-photon processes for the same ranges in and jet pseudorapidity. The jet shapes in DIS are observed to be similar to those in e+e- interactions and narrower than those in collisions for comparable . Since the jets in e+e- interactions and e+p DIS are predominantly quark initiated in both cases, the similarity in the jet shapes indicates that the pattern of QCD radiation within a quark jet is to a large extent independent of the hard scattering process in these reactions.