Abstract
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 Σ −, p, π −, and π + beams. Parametrizing the dependence of the inclusive production cross section on the atomic number A as A α, we determine α for D +, D 0, D + s , D +(2010), Λ + 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 α on x F for any charm species for the interval 0.1<x F <1.0. The average value of α for charm production by pion beams is α meson=0.850±0.028. This is somewhat larger than the corresponding average α baryon=0.755±0.016 for charm production by baryon beams (Σ −, p).
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The SELEX Collaboration., Blanco-Covarrubias, A., Engelfried, J. et al. Nuclear dependence of charm production. Eur. Phys. J. C 64, 637–644 (2009). https://doi.org/10.1140/epjc/s10052-009-1174-0
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DOI: https://doi.org/10.1140/epjc/s10052-009-1174-0