Published January 27, 1992 | Version v1
Journal article

Nuclear dependence of high-xt hadron and high-τ hadron-pair production in p-A interactions at √s =38.8 GeV

  • 1. University of Washington, Seattle, Washington 98195 (United States)
  • 2. State University of New York, Stony Brook, New York 11794 (United States)
  • 3. Kyoto University, Kyoto 606 (Japan)
  • 4. KEK, National Laboratory for High Energy Physics, Tsukuba, Ibaraki-ken 305 (Japan)
  • 5. Florida State University, Tallahassee, Florida 32306 (United States)
  • 6. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
  • 7. Columbia University, New York, New York 10027 (United States)
  • 8. CERN, CH-1124 Geneva 23 (Switzerland)
  • 9. Centre d'Etudes Nucleaires de Saclay, Gif-sur-Yvette 91190 (France)

Description

We present a high-statistics, species-identified measurement of the W-to-Be per-nucleon cross-section ratio, RW/Be, for high-xt hadrons and high-τ h+h- pairs produced in p-A collisions at √s =38.8 GeV. The data extend to 0.62 in xt and 0.39 in √τ . For single hadrons, RW/Be peaks at pt∼5 GeV/c and decreases to ∼1 for mesons with pt>8 GeV/c. At fixed pt, RW/Be falls with √s . For symmetric pairs with √τ >0.28, RW/Be=0.84±0.02±0.07, suggesting a nuclear suppression of high-z fragmentation. RW/Be increases with pout, indicative of constituent multiple scattering

Additional details

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
68
Journal Issue
4
Journal Page Range
p. 452-455.
ISSN
0031-9007
CODEN
PRLTAO