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

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

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

Nov 16, 2015

10 pages

Published in:

Phys.Rev.D 93 (2016) 3, 032002

Published: Feb 9, 2016

e-Print:

1511.05113 [hep-ex]

DOI:

10.1103/PhysRevD.93.032002

Report number:

FERMILAB-PUB-15-496-E

Experiments:

FNAL-E-0823

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Abstract: (APS)

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.

Note:

10 pages, 12 figures, submitted to Phys. Rev. D

13.85.Ni
13.60.Rj
anti-p p: colliding beams
Lambda: hadroproduction
Antilambda: hadroproduction
baryon antibaryon: ratio
production: asymmetry
rapidity: difference
rapidity dependence
transverse momentum dependence

References(19)

Figures(12)

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