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

Bertram, Iain Alexander and Fox, Harald and Borissov, Guennadi and Ratoff, Peter Neil and Ross, Anthony and Williams, Mark Richard James and Price, Darren (2016) Measurement of the forward-backward asymmetry of Λ and Λ¯ production in pp¯ collisions. Physical Review D, 93 (3). ISSN 1550-7998

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
ID Code:
78338
Deposited By:
Deposited On:
26 Feb 2016 13:26
Refereed?:
Yes
Published?:
Published
Last Modified:
31 May 2020 03:33