Title of article
Observation of hard scattering in photoproduction events with a large rapidity gap at HERA
Author/Authors
ZEUS Collaboration، نويسنده , , M. Derrick، نويسنده , , D. Krakauer، نويسنده , , S. Magill، نويسنده , , B. Musgrave، نويسنده , , J. Repond، نويسنده , , J. Schlereth، نويسنده , , Christopher R. Stanek، نويسنده , , R.L. Talaga، نويسنده , , J. Thron، نويسنده , , F. Arzarello، نويسنده , , R. Ayad، نويسنده , , G. Bari، نويسنده , , M. Basile، نويسنده , , L. Bellagamba، نويسنده , , D. Boscherini، نويسنده , , C. B. Vicentini and A. Bruni، نويسنده , , G. Bruni، نويسنده , , P. Bruni، نويسنده , , G. Cara Romeo، نويسنده , , et al.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1995
Pages
16
From page
399
To page
414
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 γp 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.
Journal title
PHYSICS LETTERS B
Serial Year
1995
Journal title
PHYSICS LETTERS B
Record number
904687
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