OBSERVATION OF HARD SCATTERING IN PHOTOPRODUCTION EVENTS WITH A LARGE RAPIDITY GAP AT HERA

ZEUS Collaboration; J Repond; U Mallik; E Mccliment

doi:10.1016/0370-2693(95)00022-D

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OBSERVATION OF HARD SCATTERING IN PHOTOPRODUCTION EVENTS WITH A LARGE RAPIDITY GAP AT HERA

Journal article

Peer reviewed

OBSERVATION OF HARD SCATTERING IN PHOTOPRODUCTION EVENTS WITH A LARGE RAPIDITY GAP AT HERA

ZEUS Collaboration, J Repond, U Mallik and E Mccliment

Physics letters. B, Vol.346(3-4), pp.399-414

03/09/1995

DOI: 10.1016/0370-2693(95)00022-D

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Abstract

Events with a large rapidity gap and total transverse energy greater than 5 GeV have been observed in quasi-real photoproduction at HERA with the ZEUS detector. The distribution of these events as a function of the gamma p centre of mass energy is consistent with diffractive scattering. For total transverse energies above 12 GeV, the hadronic final states show predominantly a two-jet structure with each jet having a transverse energy greater than 4 GeV. For the two-jet events, little energy flow is found outside the jets. This observation is consistent with the hard scattering of a quasi-real photon with a colourless object in the proton.

Physical Sciences

Physics

Astronomy & Astrophysics

Physics, Nuclear

Physics, Particles & Fields

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Details

Title: Subtitle: OBSERVATION OF HARD SCATTERING IN PHOTOPRODUCTION EVENTS WITH A LARGE RAPIDITY GAP AT HERA
Creators: ZEUS Collaboration
J Repond (Contributor)
U Mallik (Contributor)
E Mccliment (Contributor)
Resource Type: Journal article
Publication Details: Physics letters. B, Vol.346(3-4), pp.399-414
DOI: 10.1016/0370-2693(95)00022-D
ISSN: 0370-2693
eISSN: 1873-2445
Publisher: Elsevier
Number of pages: 16
Language: English
Date published: 03/09/1995
Academic Unit: Physics and Astronomy
Record Identifier: 9984627324102771

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