Jet shapes at Hera

Journal Article · Sun Apr 20 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.53653· OSTI ID:21167619

Martinez, Mario ^[1]

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1. Departamento de Fisica Teorica, Universidad Autonoma de Madrid, Ciudad Universitaria Cantoblanco, Madrid (Spain)

The shape of jets produced in quasi-real photon-proton interactions and deep inelastic positron-proton scattering (DIS) at high Q{sup 2} (Q{sup 2}>100 GeV{sup 2}) has been measured with the ZEUS detector at HERA. Jets with transverse energies E{sub T}{sup jet}>14 GeV and pseudorapidities ({eta}{sup jet}) in the range -1<{eta}{sup 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}{sup jet} increases and narrows as E{sub T}{sup 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 pp-bar collisions, and are similar to those in e{sup +}e{sup -} interactions.

• OSTI ID: 21167619
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 407; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
DEEP INELASTIC SCATTERING
ELECTRONS
FOUR MOMENTUM TRANSFER
GEV RANGE
HERA STORAGE RING
JET MODEL
MULTIPARTICLE SPECTROMETERS
NEUTRAL CURRENTS
PARTICLE IDENTIFICATION
PARTICLE RAPIDITY
PHOTON-PROTON INTERACTIONS
PHOTOPRODUCTION
POSITRONS
PROTON-ANTIPROTON INTERACTIONS
PROTONS
QUANTUM CHROMODYNAMICS
TRANSVERSE ENERGY