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APS » Journals » Phys. Rev. D » Volume 56 » Issue 9
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Phys. Rev. D 56, R5301–R5305 (1997)

Emergence of jet dominance in γp interactions at fixed-target energies

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D. Alton1, D. Lincoln6, N. Akchurin3, P. Birmingham7, C. C. Chang4, M. D. Corcoran6, W. L. Davis1, H. R. Gustafson5, C. Halli4, H. Holmgren4, P. Kasper2, M. J. Longo5, J. Marraffino2, J. McPherson3, G. Morrow6, G. S. Mutchler6, D. Naples4, Y. Onel3, G. P. Thomas1, M. M. Traynor6, J. W. Waters7, M. S. Webster7, and Q. Zhu6
1Ball State University, Muncie, Indiana 47306
2Fermi National Accelerator Laboratory, Batavia, Illinois 60510
3University of Iowa, Iowa City, Iowa 52242
4University of Maryland, College Park, Maryland 20742
5University of Michigan, Ann Arbor, Michigan 48109
6Rice University, Houston, Texas 77005
7Vanderbilt University, Nashville, Tennessee 37235

Received 4 October 1996; published in the issue dated 1 November 1997

In Fermilab experiment E683 we have used a large solid angle calorimeter to study the production of hadronic events with large transverse energy in γp and πp collisions at center-of-mass energies from 20 to 25 GeV. We observe a sudden shift in γp event topology with increasing transverse energy, indicative of the emergence of jet dominance. This is the first observation of such a shift in event topology in fixed-target interactions. πp interactions in the same kinematic region and under identical triggering conditions exhibit only a slight shift in event topology.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.56.R5301
DOI:
10.1103/PhysRevD.56.R5301
PACS:
13.60.Hb, 13.85.Hd, 13.87.Ce
 
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