Document Type
Article
Publication Date
3-9-1995
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. © 1995.
Publication Source (Journal or Book title)
Physics Letters B
First Page
399
Last Page
414
Recommended Citation
Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Repond, J., Schlereth, J., Stanek, R., Talaga, R., Thron, J., Arzarello, F., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Ciralli, F., Contin, A., D'Auria, S., Frasconi, F., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., & Margotti, A. (1995). Observation of hard scattering in photoproduction events with a large rapidity gap at HERA. Physics Letters B, 346 (3-4), 399-414. https://doi.org/10.1016/0370-2693(95)00022-D