Hadronic Production of Lambdac from 600 GeV/c pion, sigma and proton beams
SELEX Collaboration, Fernanda G. Garcia
Abstract
We present data from Fermilab experiment E781 (SELEX) on the hadroproduction asymmetry for anti-Lambdac compared to Lambdac+ as a function of xF and pt2 distributions for Lambdac+. 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 Lambdac formation, as suggested by the leading quark picture.
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