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Differential cross sections of J/{psi} and {psi}{sup {prime}} in 800 GeV/cp-Si interactions

Journal Article · · Physical Review, D
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  1. University of Wisconsin, Madison, Wisconsin 53706 (United States)
  2. University and INFN of Pavia, Pavia (Italy)
  3. University of Virginia, Charlottesville, Virginia 22901 (United States)
  4. University of California at Berkeley, Berkeley, California 94720 (United States)
  5. University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
  6. Northwestern University, Evanston, Illinois 60208 (United States)
  7. University of California at Los Angeles, Los Angeles, California 90024 (United States)
  8. Nanjing University, Nanjing, Peoples Republic of (China)
  9. University of South Alabama, Mobile, Alabama 36688 (United States)
  10. Vanier College, Montreal, Quebec, H4L 3X9 (CANADA)
  11. University and INFN of Lecce, Lecce (Italy)
  12. Duke University, Durham, North Carolina 27706 (United States)
  13. Prairie View AM, Prairie View, Texas 77446 (United States)
  14. Shandong University, Jinan, Shandong, Peoples Republic of (China)
  15. University of Houston, Houston, Texas 77204 (United States)
  16. Fermilab, Batavia, Illinois 60510 (United States)
  17. Comenius University, Bratislava (Slovakia)
  18. McGill University, Montreal, Quebec, H3A 2T8 (CANADA)
+ Show Author Affiliations
We present the x{sub F} and p{sub T} differential cross sections of J/{psi} and {psi}{sup {prime}}, respectively, in the ranges {minus}0.05{lt}x{sub F}{lt}0.25 and p{sub T}{lt}3.5 GeV/c. The data samples are constituted by about 12000 J/{psi} and 200 {psi}{sup {prime}} produced in proton-silicon interactions at 800 GeV/c and decaying into opposite sign muons. The x{sub F} and p{sub T} distributions are compared with recent results from experiments E789 at the same energy and to leading order QCD predictions using the MRS D0 parametrization for the parton structure function. The measured shapes of the differential cross sections, except for the d{sigma}/dx{sub F} at small x{sub F}, agree very well with the prediction, even though their value is quite a bit larger than the prediction. We also present the cos{theta} differential cross section of the J/{psi} which indicates unpolarized production in contrast with color octet models predictions. {copyright} {ital 1997} {ital The American Physical Society}
OSTI ID:
534455
Journal Information:
Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
Country of Publication:
United States
Language:
English

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Related Subjects

66 PHYSICS
COLOR MODEL
DIFFERENTIAL CROSS SECTIONS
GEV RANGE 100-1000
J PSI-3097 MESONS
MUONS
PARTICLE PRODUCTION
PARTON MODEL
PARTONS
PROTON REACTIONS
PSI-3685 MESONS
QUANTUM CHROMODYNAMICS
SHAPE
SILICON
STRUCTURE FUNCTIONS