| Resumen |
We study Λ and Λ¯ production asymmetries in pp̄ →Λ(Λ¯ )X , pp̄ →J/ψΛ(Λ¯ )X , and pp̄ →μ ± Λ(Λ¯ )X events recorded by the D0 detector at the Fermilab Tevatron collider at √s=1.96 TeV . We find an excess of Λ’s (Λ¯’s) produced in the proton (antiproton) direction. This forward-backward asymmetry is measured as a function of rapidity. We confirm that the Λ¯ /Λ production ratio, measured by several experiments with various targets and a
wide range of energies, is a universal function of “rapidity loss,” i.e., the rapidity difference of the beam proton and the lambda. |
