Measurement of jet shapes in high Q2Q^{2} deep inelastic scattering at HERA

Collaboration
Mar, 1998
21 pages
Published in:
  • Eur.Phys.J.C 8 (1999) 367-380
e-Print:
Report number:
  • DESY-98-038
Experiments:

Citations per year

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Abstract:
The shapes of jets with transverse energies, E_T(jet), up to 45 GeV produced in neutral- and charged-current deep inelastic e+p scattering (DIS) at Q**2 > 100 GeV**2 have been measured with the ZEUS detector at HERA. Jets are identified using a cone algorithm in the eta-phi plane with a cone radius of one unit. The jets become narrower as E_T(jet) 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 E_T(jet) and jet pseudorapidity. The jet shapes in DIS are observed to be similar to those in e+e- interactions and narrower than those in pbarp collisions for comparable E_T(jet). 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.
Note:
  • 28 pages including 9 figures Report-no: DESY-98-038
  • positron p: colliding beams
  • positron p: deep inelastic scattering
  • jet: electroproduction
  • momentum transfer: high
  • event shape analysis
  • transverse energy: dependence
  • neutral current
  • charged current
  • ZEUS
  • experimental results