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

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

2001-09-14

arxiv.org/abs/hep-ex/0109017v1

Phys.Lett.B528:49-57,2002

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1016/S0370-2693(01)01484-8

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.

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