Abstract
Dijet cross sections are presented using photoproduction data obtained with the ZEUS detector during 1994. These measurements represent an extension of previous results, as the higher statistics allow cross sections to be measured at higher jet transverse energy (E jetτ ). Jets are identified in the hadronic final state using three different algorithms, and the cross sections compared to complete next-to-leading order QCD calculations. Agreement with these calculations is seen for the pseudorapidity dependence of the direct photon events with E jetT > 6 GeV and of the resolved photon events with E jett > 11 GeV. Calculated cross sections for resolved photon processes with 6 GeV < E jetT < 11 GeV lie below the data.
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References
ZEUS Collab.M.Derrick et al., Phys. Lett. B348 (1995) 665
Hl Collab., C. Adloff et al., DESY 97-164, to appear in Z. Phys C
J. R. Forshaw and R. G. Roberts, Phys. Lett. B319 (1993) 539
ZEUS Collab., The ZEUS detector, Status Report (1993)
C. Alvisi et al., Nucl. Instr. and Meth. A305 (1991) 30
N. Harnew et al., Nucl. Inst. Meth. A279 (1989) 290;
M. Derrick et al., Nucl. Instr. and Meth. A309 (1991) 77;
J. Andruszków et al., DESY 92-066
J. E. Huth et al., Proc. of the 1990 DPF Summer Study on High Energy Physics, Snowmass, Colorado, edited by E.L. Berger, (World Scientific, Singapore, 1992) 134
W. T. Giele and W. B. Kilgore, Phys. Rev. D55 (1997) 7183;
W. B. Kilgore, hep-ph/9705384;
M. H. Seymour, hep-ph/9797338
CDF Collab., F. Abe et al., Phys. Rev. D45 (1992) 1448
S. Catani, Yu.L. Dokshitzer; M.H. Seymour and B.R. Webber, Nucl. Phys. B406 (1993) 187
S.D. Ellis and D.E. Soper, Phys. Rev. D48 (1993) 3160
S.D. Ellis, Z. Kunszt and D.E. Soper, Phys. Rev. Lett. 69 (1992) 3615
J. M. Butterworth, L. Feld, M. Klasen and G. Kramer, hep-ph/9608481;Proceedings of the Workshop on “Future Physics at HERA”, Editors: G. Ingelman, A. DeRoeck, R. Klanner, DESY 1996, p. 554
ZEUS Collab., M. Derrick et al., Phys. Lett. B316 (1993) 412
ZEUS Collab., M. Derrick et al., Phys. Lett. B322 (1994) 287
F. Jacquet and A. Blondel, in Proceedings of the study of an ep facility for Europe, Hamburg, ed. U. Amaldi, (DESY 79/48, 1979) 391
ZEUS Collab., M. Derrick et al., Z. Phys. C72 (1996) 399
L. Feld, Ph.D. thesis BONN-IR-96-17, Bonn University, December 1996,
R. Saunders, Ph.D. thesis, University College London 1997
G. Marchesini et al., Comp. Phys. Comm. 67 (1992) 465
T. Sjöstrand, Comp. Phys. Comm. 82 (1994) 74
M. Chick, E. Reya and A. Vogt, Phys. Rev. D46 (1992) 1973
A. D. Martin, W.J. Stirling and R.G. Roberts, Phys. Rev. D50 (1994) 6734
T. Sjöstrand and M. van Zijl, Phys. Rev. D36 (1987) 2019;
J. M. Butterworth, J. R. Forshaw and M. H. Seymour, Z. Phys. C72 (1996) 637
Hl Collab., S. Aid et al., Z. Phys. C70 (1996) 17
H. Abramowicz, K. Charchula and A. Levy, Phys. Lett. B269 (1991) 458
M. Klasen and G. Kramer, DESY-96-246, hep-ph/9611450
CTEQ Collab., J. Botts et al., Phys. Lett. B304 (1993) 159;
CTEQ Collab., H.L. Lai et al., Phys. Rev. D51 (1995) 4763
B. W. Harris and J. F. Owens, FSU-HEP-970411, hep-ph/9704324, to be published in Phys. Rev. D
L.E. Gordon and J.K. Storrow, Phys. Lett. B291 (1992) 320
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Zeus Collaboration., Breitweg, J., Derrick, M. et al. Dijet cross sections in photoproduction at HERA. Eur. Phys. J. C 1, 109–122 (1998). https://doi.org/10.1007/BF01245801
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DOI: https://doi.org/10.1007/BF01245801