Hadronic Production of Lambda_c from 600 GeV/c pion, sigma and proton beams

Abstract

We present data from Fermilab experiment E781 (SELEX) on the hadroproduction asymmetry for anti-Lambda_c compared to Lambda_c+ as a function of xF and pt2 distributions for Lambda_c+. These data were measured in the same apparatus using incident pi-, sigma- beams at 600 GeV/c and proton beam at 540 GeV/c. The asymmetry is studied as a function of xF. In the forward hemisphere with xF >= 0.2 both baryon beams exhibit very strong preference for producing charm baryons rather than charm antibaryons, while the pion beam asymmetry is much smaller. In this energy regime the results show that beam fragments play a major role in the kinematics of Lambda_c formation, as suggested by the leading quark picture.

6 pages, 5 figures (postscript), RevTeX, submitted to Phy. Rev. Lett

References in corpus (8)

• Asymmetries between the production of D+ and D- mesons from 500 GeV/c pi- nucleon interactions as a function of xF and pt**2
• QCD and Intrinsic Heavy Quark Predictions for Leading Charm and Beauty Hadroproduction
• The SELEX Phototube RICH Detector
• Production mechanisms of charm hadrons in the string model
• Asymmetries in the Production of ${\Lambda }_c^{+}$ and ${\Lambda }_c^{-}$ Baryons in 500 GeV/c ${\pi }^{-}$ Nucleon Interactions
• Charge Asymmetries for D, D_s and Lambda_c Production in Sigma- - Nucleus Interactions at 340 GeV/c
• Total Forward and Differential Cross Sections of Neutral D Mesons Produced in 500 GeV/c ${\pi }^{-}$-Nucleon Interactions
• On the Character of Leading Asymmetry in the Hadroproduction of Charmed Mesons and Baryons

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