Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production

We propose a model for the longitudinal polarization of Lambda /sup 0 / baryons produced in deep-inelastic lepton scattering at any x/sub F /, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. The free par...

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Detalles Bibliográficos
Autores principales: Ellis, Jonathan Richard, Kotzinian, A M, Naumov, D V
Lenguaje:eng
Publicado: 2002
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1140/epjc/s2002-01025-2
http://cds.cern.ch/record/623643
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author Ellis, Jonathan Richard
Kotzinian, A M
Naumov, D V
author_facet Ellis, Jonathan Richard
Kotzinian, A M
Naumov, D V
author_sort Ellis, Jonathan Richard
collection CERN
description We propose a model for the longitudinal polarization of Lambda /sup 0 / baryons produced in deep-inelastic lepton scattering at any x/sub F /, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. The free parameters of the model are fixed by fitting NOMAD data on the longitudinal polarization of Lambda /sup 0/ hyperons in neutrino collisions. Our model correctly reproduces the observed dependences of the Lambda /sup 0/ 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. (42 refs).
id cern-623643
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
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spelling cern-6236432019-09-30T06:29:59Zdoi:10.1140/epjc/s2002-01025-2http://cds.cern.ch/record/623643engEllis, Jonathan RichardKotzinian, A MNaumov, D VIntrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic productionParticle Physics - PhenomenologyWe propose a model for the longitudinal polarization of Lambda /sup 0 / baryons produced in deep-inelastic lepton scattering at any x/sub F /, based on static SU(6) quark-diquark wave functions and polarized intrinsic strangeness in the nucleon associated with individual valence quarks. The free parameters of the model are fixed by fitting NOMAD data on the longitudinal polarization of Lambda /sup 0/ hyperons in neutrino collisions. Our model correctly reproduces the observed dependences of the Lambda /sup 0/ 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. (42 refs).oai:cds.cern.ch:6236432002
spellingShingle Particle Physics - Phenomenology
Ellis, Jonathan Richard
Kotzinian, A M
Naumov, D V
Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production
title Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production
title_full Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production
title_fullStr Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production
title_full_unstemmed Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production
title_short Intrinsic polarized strangeness and $\Lambda^{0}$ polarization in deep-inelastic production
title_sort intrinsic polarized strangeness and $\lambda^{0}$ polarization in deep-inelastic production
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1140/epjc/s2002-01025-2
http://cds.cern.ch/record/623643
work_keys_str_mv AT ellisjonathanrichard intrinsicpolarizedstrangenessandlambda0polarizationindeepinelasticproduction
AT kotzinianam intrinsicpolarizedstrangenessandlambda0polarizationindeepinelasticproduction
AT naumovdv intrinsicpolarizedstrangenessandlambda0polarizationindeepinelasticproduction

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