Observation of direct processes in photoproduction at HERA

M Derrick; D Krakauer; R Ayad; G Bari; M Basile; L Bellagamba; D Boscherini; A Bruni; G Bruni; P Bruni; G CARA ROMEO; G Castellini; S Magill; M Chiarini; L Cifarelli; F Cindolo; F Ciralli; A Contin; C DEL PAPA; S D'AURIA; F Frasconi; P Giusti; G Iacobucci; B Musgrave; G Laurenti; G Levi; Q Lin; G Maccarrone; A Margotti; T Massam; R Nania; C Nemoz; F Palmonari; G Sartorelli; J Repond; R Timellini; Y ZAMORA GARCIA; A Zichichi; A Bargende; J Crittenden; K Desch; B Diekmann; T Doeker; L Feld; A Frey; S Repond; M Geerts; G Geitz; H Hartmann; D Haun; K Heinloth; E Hilger; H.-P Jakob; U. F Katz; S Kramarczyk; M Kückes; R Stanek; R. L Talaga; J Thron; F Arzarello; ZEUS Collaboration

doi:10.1016/0370-2693(94)91121-5

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Observation of direct processes in photoproduction at HERA

Journal article

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Peer reviewed

Observation of direct processes in photoproduction at HERA

M Derrick, D Krakauer, R Ayad, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, …

Physics letters. B, Vol.322(3), pp.287-300

02/17/1994

DOI: 10.1016/0370-2693(94)91121-5

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Abstract

Jets in photoproduction events have been studied with the ZEUS detector for γp centre-of-mass energies ranging from 130 to 250 GeV. The inclusive jet distributions give evidence for the dominance of resolved photon interactions. In the di-jet sample the direct processes are for the first time clearly isolated. Di-jet cross sections for the resolved and direct processes are given in a restricted kinematic range.

Physics

Exact sciences and technology

General

Mathematical methods in physics

Meson production

Numerical approximation and analysis

Numerical simulation, solution of equations

Photon and charged-lepton interactions with hadrons

Specific reactions and phenomenology

The physics of elementary particles and fields

Total and inclusive cross sections (including deep-inelastic processes)

Details

Title: Subtitle: Observation of direct processes in photoproduction at HERA
Creators: M Derrick - Argonne national lab., Argonne IL, United States
D Krakauer - Argonne national lab., Argonne IL, United States
R Ayad - Argonne national lab., Argonne IL, United States
G Bari - Argonne national lab., Argonne IL, United States
M Basile - Argonne national lab., Argonne IL, United States
L Bellagamba - Argonne national lab., Argonne IL, United States
D Boscherini - Argonne national lab., Argonne IL, United States
A Bruni - Argonne national lab., Argonne IL, United States
G Bruni - Argonne national lab., Argonne IL, United States
P Bruni - Argonne national lab., Argonne IL, United States
G CARA ROMEO - Argonne national lab., Argonne IL, United States
G Castellini - Argonne national lab., Argonne IL, United States
S Magill - Argonne national lab., Argonne IL, United States
M Chiarini - Argonne national lab., Argonne IL, United States
L Cifarelli - Argonne national lab., Argonne IL, United States
F Cindolo - Argonne national lab., Argonne IL, United States
F Ciralli - Argonne national lab., Argonne IL, United States
A Contin - Argonne national lab., Argonne IL, United States
C DEL PAPA - Argonne national lab., Argonne IL, United States
S D'AURIA - Argonne national lab., Argonne IL, United States
F Frasconi - Argonne national lab., Argonne IL, United States
P Giusti - Argonne national lab., Argonne IL, United States
G Iacobucci - Argonne national lab., Argonne IL, United States
B Musgrave - Argonne national lab., Argonne IL, United States
G Laurenti - Argonne national lab., Argonne IL, United States
G Levi - Argonne national lab., Argonne IL, United States
Q Lin - Argonne national lab., Argonne IL, United States
G Maccarrone - Argonne national lab., Argonne IL, United States
A Margotti - Argonne national lab., Argonne IL, United States
T Massam - Argonne national lab., Argonne IL, United States
R Nania - Argonne national lab., Argonne IL, United States
C Nemoz - Argonne national lab., Argonne IL, United States
F Palmonari - Argonne national lab., Argonne IL, United States
G Sartorelli - Argonne national lab., Argonne IL, United States
J Repond - Argonne national lab., Argonne IL, United States
R Timellini - Argonne national lab., Argonne IL, United States
Y ZAMORA GARCIA - Argonne national lab., Argonne IL, United States
A Zichichi - Argonne national lab., Argonne IL, United States
A Bargende - Argonne national lab., Argonne IL, United States
J Crittenden - Argonne national lab., Argonne IL, United States
K Desch - Argonne national lab., Argonne IL, United States
B Diekmann - Argonne national lab., Argonne IL, United States
T Doeker - Argonne national lab., Argonne IL, United States
L Feld - Argonne national lab., Argonne IL, United States
A Frey - Argonne national lab., Argonne IL, United States
S Repond - Argonne national lab., Argonne IL, United States
M Geerts - Argonne national lab., Argonne IL, United States
G Geitz - Argonne national lab., Argonne IL, United States
H Hartmann - Argonne national lab., Argonne IL, United States
D Haun - Argonne national lab., Argonne IL, United States
K Heinloth - Argonne national lab., Argonne IL, United States
E Hilger - Argonne national lab., Argonne IL, United States
H.-P Jakob - Argonne national lab., Argonne IL, United States
U. F Katz - Argonne national lab., Argonne IL, United States
S Kramarczyk - Argonne national lab., Argonne IL, United States
M Kückes - Argonne national lab., Argonne IL, United States
R Stanek - Argonne national lab., Argonne IL, United States
R. L Talaga - Argonne national lab., Argonne IL, United States
J Thron - Argonne national lab., Argonne IL, United States
F Arzarello - Argonne national lab., Argonne IL, United States
ZEUS Collaboration
Resource Type: Journal article
Publication Details: Physics letters. B, Vol.322(3), pp.287-300
DOI: 10.1016/0370-2693(94)91121-5
ISSN: 0370-2693
eISSN: 1873-2445
Publisher: Elsevier Science
Language: English
Date published: 02/17/1994
Academic Unit: Physics and Astronomy
Record Identifier: 9984627291702771

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