Observation of hard scattering in photoproduction events with a large rapidity gap at HERA

David Bailey; M. Derrick; D. Krakauer; S. Magill; B. Musgrave; J. Repond; J. Schlereth; R. Stanek; R. L. Talaga; J. Thron; F. Arzarello; R. Ayad; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; P. Bruni; G. Cara Romeo; G. Castellini; M. Chiarini; L. Cifarelli

Observation of hard scattering in photoproduction events with a large rapidity gap at HERA

David Bailey, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R. L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara RomeoG. Castellini, M. Chiarini, L. Cifarelli

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	399-414
Number of pages	15
Journal	Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	346
Issue number	3-4
Publication status	Published - 1995

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Bailey, D., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Repond, J., Schlereth, J., Stanek, R., Talaga, R. L., Thron, J., Arzarello, F., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., ... Cifarelli, L. (1995). Observation of hard scattering in photoproduction events with a large rapidity gap at HERA. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 346(3-4), 399-414.

@article{ec6cfdf0f4af4f6f86d28f86f223c6aa,

title = "Observation of hard scattering in photoproduction events with a large rapidity gap at HERA",

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.",

author = "David Bailey and M. Derrick and D. Krakauer and S. Magill and B. Musgrave and J. Repond and J. Schlereth and R. Stanek and Talaga, {R. L.} and J. Thron and F. Arzarello and R. Ayad and G. Bari and M. Basile and L. Bellagamba and D. Boscherini and A. Bruni and G. Bruni and P. Bruni and {Cara Romeo}, G. and G. Castellini and M. Chiarini and L. Cifarelli",

year = "1995",

language = "English",

volume = "346",

pages = "399--414",

journal = "Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

number = "3-4",

}

Bailey, D, Derrick, M, Krakauer, D, Magill, S, Musgrave, B, Repond, J, Schlereth, J, Stanek, R, Talaga, RL, 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 1995, 'Observation of hard scattering in photoproduction events with a large rapidity gap at HERA', Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 346, no. 3-4, pp. 399-414.

TY - JOUR

T1 - Observation of hard scattering in photoproduction events with a large rapidity gap at HERA

AU - Bailey, David

AU - Derrick, M.

AU - Krakauer, D.

AU - Magill, S.

AU - Musgrave, B.

AU - Repond, J.

AU - Schlereth, J.

AU - Stanek, R.

AU - Talaga, R. L.

AU - Thron, J.

AU - Arzarello, F.

AU - Ayad, R.

AU - Bari, G.

AU - Basile, M.

AU - Bellagamba, L.

AU - Boscherini, D.

AU - Bruni, A.

AU - Bruni, G.

AU - Bruni, P.

AU - Cara Romeo, G.

AU - Castellini, G.

AU - Chiarini, M.

AU - Cifarelli, L.

PY - 1995

Y1 - 1995

N2 - 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.

AB - 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.

M3 - Article

SN - 0370-2693

VL - 346

SP - 399

EP - 414

JO - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

Observation of hard scattering in photoproduction events with a large rapidity gap at HERA

Abstract

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