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HK: Hadronen und Kerne

HK 49: Hadronic Probes V, Particle Production

HK 49.6: Gruppenbericht

Mittwoch, 18. März 1998, 16:15–16:45, C

Charge Asymmetries of Charm Hadrons and Total Charm Production in Σ⁻ - Nucleus Interactions at 340 GeV/c [1] — •O. Thilmann — Physikalisches Institut der Universit"at Heidelberg, Philosophenweg 12, 69120 Heidelberg

The experiment WA89 has studied charmed particle production in Σ⁻ - nucleus collisions at 340 GeV/c. Production of particles which have light quarks in common with the beam (D⁻, D_s⁻, Λ_c) are compared to production of those which have not (D⁺, D_s⁺, Λ_c). Considerable production asymmetries between the charge conjugate pairs have been observed. The x_f distributions will be compared with pion beam data and with theoretical predictions.
In addition, the total charm/anticharm cross section was determined in the range x_f > 0. The results will be compared to cross sections measured in proton - nucleus collisions.

[1] supported by BMBF under Nr.05 5HD15I, 06 HD524I und 06 MZ5265