Intrinsic Polarized Strangeness and Lambda Polarization in Deep-Inelastic Production

Details Intrinsic Polarized Strangeness and Lambda Polarization in Deep-Inelastic Production Intrinsic Polarized Strangeness and Lambda Polarization in Deep-Inelastic Production

2002-04-17

arxiv.org/abs/hep-ph/0204206v1

Eur.Phys.J.C25:603-613,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1140/epjc/s2002-01025-2

We propose a model for the longitudinal polarization of Lambda baryons produced in deep-inelastic lepton scattering at any xF, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. Free parameters of the model are fixed by fitting NOMAD data on the longitudinal polarization of Lambda hyperons in neutrino collisions. Our model correctly reproduces the observed dependences of Lambda polarization on the kinematic variables. Within the context of our model, the NOMAD data imply that the intrinsic strangeness associated with a valence quark has anticorrelated polarization. We also compare our model predictions with results from the HERMES and E665 experiments using charged leptons. Predictions of our model for the COMPASS experiment are also presented.

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