Measurement of jet shapes in high deep inelastic scattering at HERA
Mar, 199821 pages
Published in:
- Eur.Phys.J.C 8 (1999) 367-380
e-Print:
- hep-ex/9804001 [hep-ex]
Report number:
- DESY-98-038
Experiments:
Citations per year
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
References(47)
Figures(9)