Particle-Antiparticle Asymmetries of $\Lambda$ Production in Hadron-Nucleon Collisions

Abstract

The particle-antiparticle asymmetries of $\Lambda$ production in 250 GeV/c ${\pi }^{\pm }$, $K^{\pm }$, and $p$ --nucleon collisions are studied with two model parametrizations of quark to $\Lambda$ fragmentation functions. It is shown that the available data can be qualitatively explained by the calculated results in both the quark-diquark model and a pQCD based analysis of fragmentation functions. The differences in the two model predictions are significant for $K^{\pm }$ beams, and high precision measurements of the asymmetries with detailed $x_F$ and $P_T$ information can discriminate between different predictions.

arXiv comment14 LaTex pages, 4 figures, to appear in Phys. Lett. B

References in corpus (16)

• QCD Constrains on the Shape of Polarized Quark and Gluon Distributions
• Pionic Parton Distributions Revisited
• Asymmetry of Lambda Baryons in Hadronic Z^0 Decays
• Valence Quark Spin Distribution Functions
• Lambda and Antilambda polarization from deep inelastic muon scattering
• Quark Structure of $\Lambda$ from $\Lambda$-Polarization in Z Decays
• Flavor and Spin Structure of $\Lambda$-Baryon at Large x
• Mesonic Parton Densities Derived From Constituent Quark Model Constraints
• The Flavor and Spin Structure of Hyperons from Quark Fragmentation
• Measurement of Longitudinal Spin Transfer to Lambda Hyperons in Deep-Inelastic Lepton Scattering
• Asymmetric Quark/Antiquark Hadronization in e+e- Annihilation
• Helicity and Transversity Distribution of Nucleon and $\Lambda$-Hyperon from $\Lambda$ Fragmentation
• Quark Distributions of Octet Baryons from SU(3) Symmetry
• Connection between Distribution and Fragmentation Functions
• Asymmetries in the Production of Lambda0 in 250 GeV/c pi+-, K+- and p -- Nucleon Interactions
• Phenomenological Relation between Distribution and Fragmentation Functions

Cited by in corpus (1)

• Nuclear EMC effect through $\bar{\Lambda }/\Lambda$ production in semi-inclusive deep-inelastic scattering processes