Jets and energy flow in photon - proton collisions at HERA

Properties of the hadronic final state in photoproduction events with large transverse energy are studied at the electron-proton collider HERA. Distributions of the transverse energy, jets and underlying event energy are compared to

\overline{p}p

data and QCD calculations. The comparisons show that the

\gamma p

events can be consistently described by QCD models including -- in addition to the primary hard scattering process -- interactions between the two beam remnants. The differential jet cross sections

d\sigma/dE_T~{jet}

and

d\sigma/d\eta~{jet}

are measured.

Note:

27 pages, latex, 7 figures appended as uuencoded file Report-no: DESY 95-219

electron p: colliding beams
colliding beams: electron p
electron p: deep inelastic scattering
deep inelastic scattering: electron p
transverse energy: energy flow
jet: electroproduction
electroproduction: jet
correlation
jet: event shape analysis
differential cross section

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