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SILVERSTEIN, S , SMITH, W H , TSURUGAI, T , BHADRA, S , FRISKEN, W R and FURUTANI, K M (1995) Observation of hard scattering in photoproduction events with a large rapidity gap at HERA. Physics Letters B, 346 (3-4).
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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.
This is a Submitted version This version's date is: 9/3/1995 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/f0c06e43-5e80-5b86-1f4a-bb1705aa91bf/3/
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