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Phys. Rev. Lett. 81, 5085–5088 (1998)

Nuclear Transparency in Large Momentum Transfer Quasielastic Scattering

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I. Mardor1,*, S. Durrant2, J. Aclander1, J. Alster1, D. Barton2, G. Bunce2, A. Carroll2, N. Christensen3,†, H. Courant3, S. Gushue2, S. Heppelmann4, E. Kosonovsky1, Y. Mardor1,‡, M. Marshak3, Y. Makdisi2, E. D. Minor4,§, I. Navon1, H. Nicholson5, E. Piasetzky1, T. Roser2, J. Russell6, C. S. Sutton5, M. Tanaka2,**, C. White3, and J.-Y. Wu4,††
1School of Physics and Astronomy, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv 69978, Israel
2Brookhaven National Laboratory, Upton, New York 11973
3Physics Department, University of Minnesota, Minneapolis, Minnesota 55455
4Physics Department, Pennsylvania State University, University Park, Pennsylvania 16802
5Mount Holyoke College, South Hadley, Massachusetts 01075
6Physics Department, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747

Received 22 May 1998; published in the issue dated 7 December 1998

We measured simultaneously pp elastic and quasielastic (p,2p) scattering in hydrogen, deuterium, and carbon for momentum transfers of 4.8 to 6.2(GeV/c)2 at incoming momenta of 5.9 and 7.5GeV/c and center-of-mass scattering angles in the range θc.m. = 83.7°–90°. The nuclear transparency is defined as the ratio of the quasielastic cross section to the free pp cross section. At incoming momentum of 5.9GeV/c, the transparency of carbon decreases by a factor of 2 from θc.m.85° to θc.m.89°. At the largest angle the transparency of carbon increases from 5.9 to 7.5GeV/c by more than 50%. The transparency in deuterium does not depend on incoming momentum nor on θc.m..

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.5085
DOI:
10.1103/PhysRevLett.81.5085
PACS:
24.85.+p, 25.40.-h, 24.10.-i

*Present address: Soreq NRC, Yavne 81800, Israel.

Present address: Department of Physics, University of Auckland, Auckland, New Zealand.

Present address: Sheba Medical Center, Tel Aviv, Israel.

§Present address: Concurrent Technologies Corporation, Johnstown, PA.

**Deceased.

††Present address: Fermi National Accelerator Laboratory, Batavia, IL 60510.