Measurement of the forward-backward asymmetry of Λ and Λ ¯ production in p p ¯ collisions

(D0 Collaboration)

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4 Scopus citations


We study Λ and Λ¯ production asymmetries in pp¯→Λ(Λ¯)X, pp¯→J/ψΛ(Λ¯)X, and pp¯→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.

Original languageEnglish (US)
Article number032002
JournalPhysical Review D
Issue number3
StatePublished - Feb 9 2016

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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  • Measurement of the forward-backward asymmetry of $\Lambda$ and $\bar{\Lambda}$ production in $p \bar{p}$ collisions

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