The shape of jets produced in quasi-real photon-proton interactions and deep inelastic positron-proton scattering (DIS) at high Q(2) (Q(2) > 100 GeV2) has been measured with the ZEUS detector at HERA. Jets with transverse energies E-T(jet) > 14 GeV and pseudorapidities (eta(jet)) in the range -1 < eta(jet) < 2 are searched for using a cone algorithm in the ep-laboratory frame in the eta - phi plane with a cone radius of one unit. The jet shape broadens as eta(jet) increases and narrows as E-T(jet) increases. Next-to-leading order QCD calculations for inclusive jet photoproduction provide predictions for the jet shapes at the parton level which are found to be consistent with the measurements. The measured jet shapes in neutral current DIS are compared to those in photon-proton collisions and are found to be narrower. The measured jet shapes in DIS are found to be narrower than those in <(p)over bar p> collisions, and are similar to those in e(+)e(-) interactions.
ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J.R. Okrasin´ ski, et al. (1997). Jet shapes at HERA(407), 694-698.
Titolo: | Jet shapes at HERA |
Autori: | |
Data di pubblicazione: | 1997 |
Citazione: | ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J.R. Okrasin´ ski, et al. (1997). Jet shapes at HERA(407), 694-698. |
Abstract: | The shape of jets produced in quasi-real photon-proton interactions and deep inelastic positron-proton scattering (DIS) at high Q(2) (Q(2) > 100 GeV2) has been measured with the ZEUS detector at HERA. Jets with transverse energies E-T(jet) > 14 GeV and pseudorapidities (eta(jet)) in the range -1 < eta(jet) < 2 are searched for using a cone algorithm in the ep-laboratory frame in the eta - phi plane with a cone radius of one unit. The jet shape broadens as eta(jet) increases and narrows as E-T(jet) increases. Next-to-leading order QCD calculations for inclusive jet photoproduction provide predictions for the jet shapes at the parton level which are found to be consistent with the measurements. The measured jet shapes in neutral current DIS are compared to those in photon-proton collisions and are found to be narrower. The measured jet shapes in DIS are found to be narrower than those in <(p)over bar p> collisions, and are similar to those in e(+)e(-) interactions. |
Handle: | http://hdl.handle.net/11590/135710 |
Appare nelle tipologie: | 1.1 Articolo in rivista |