TY - JOUR

T1 - Measurement of the forward-backward asymmetry of Λ and Λ¯ production in pp¯ collisions

AU - Bertram, Iain Alexander

AU - Fox, Harald

AU - Borissov, Guennadi

AU - Ratoff, Peter Neil

AU - Ross, Anthony

AU - Williams, Mark Richard James

AU - Price, Darren

AU - D0 Collaboration

PY - 2016/2/9

Y1 - 2016/2/9

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevD.93.032002

DO - 10.1103/PhysRevD.93.032002

M3 - Journal article

VL - 93

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 3

M1 - 032002

ER -