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Published January 1, 2009 | Version v1
Journal article Open

Nuclear dependence of charm production

Creators

  • 1. Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78246, Mexico
  • 2. Univ Iowa, Iowa City, IA 52242 USA
  • 3. Petersburg Nucl Phys Inst, St Petersburg, Russia
  • 4. Inst Theoret & Expt Phys, Moscow 117259, Russia
  • 5. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
  • 6. Univ Michigan Flint, Flint, MI 48502 USA
  • 7. Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
  • 8. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
  • 9. Univ Sao Paulo, Sao Paulo, Brazil
  • 10. Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

Description

Using data taken by SELEX during the 1996-1997 fixed target run at Fermilab, we study the production of charmed hadrons on copper and carbon targets with Sigma(-), p, pi(-), and pi(+) beams. Parametrizing the dependence of the inclusive production cross section on the atomic number A as A(alpha), we determine alpha for D+, D-0, D-s(+), D+(2010), Lambda(+)(c), and their respective anti-particles, as a function of their transverse momentum p(t) and scaled longitudinal momentum x(F). Within our statistics there is no dependence of alpha on x(F) for any charm species for the interval 0.1 < x(F) < 1.0. The average value of alpha for charm production by pion beams is alpha(meson) = 0.850 +/- 0.028. This is somewhat larger than the corresponding average alpha(baryon) = 0.755 +/- 0.016 for charm production by baryon beams (Sigma(-), p).

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