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Phys. Rev. Lett. 87, 082002 (2001) [4 pages]

Diffractively Produced Charm Final States in 800-GeV/c pp Collisions

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M. H. L. S. Wang1 *, M. C. Berisso1 †, D. C. Christian2, J. Félix3, A. Gara4 ‡, E. Gottschalk2, G. Gutiérrez2, E. P. Hartouni5, B. C. Knapp4, M. N. Kreisler1 §, S. Lee1 **, K. Markianos1 ††, G. Moreno3, M. A. Reyes6, M. Sosa3, A. Wehmann2, and D. Wesson1 ‡‡
1University of Massachusetts, Amherst, Massachusetts 01003
2Fermilab, Batavia, Illinois 60510
3Universidad de Guanajuato, León, Guanajuato, México
4Columbia University, Nevis Laboratories, Irvington, New York 10533
5Lawrence Livermore National Laboratory, Livermore, California 94551
6Universidad Michoacana, Morelia, Michoacán, México

Received 14 December 2000; published 7 August 2001

We report the first observation of diffractively produced open charm in 800-GeV/c pp collisions of the type pp→pD*X. We measure cross sections of σdiff(D*+)  =  (0.185±0.044±0.054) μb and σdiff(D*-)  =  (0.174±0.034±0.029) μb. Our measurements are based on 4.3×109 events recorded by FNAL E690 in the fixed-target run of 1991. We compare our results with previous fixed-target charm experiments.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.87.082002
DOI: 10.1103/PhysRevLett.87.082002
PACS: 12.38.Qk, 12.40.Nn, 13.85.Ni

* Present address: LLNL, Livermore, California 94551.
† Present address: Shasta College, Redding, California 96049.
‡ Present address: IBM Corporation, Yorktown Heights, New York 10598.
§
** Present address: Cognex Corporation, Natic, Massachusetts 01760.
†† Present address: University of Washington, Seattle, Washington 98109.
‡‡ Present address: OAO Corporation, Athens, Georgia 30605.

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