Phys. Rev. D 64, 014017 (2001) [6 pages]Helicity and transversity distributions of the nucleon and Λ hyperon from Λ fragmentationSee Also: Erratum Received 11 January 2001; revised 8 March 2001; published 31 May 2001 It is shown that Λ-hyperon fragmentation in charged lepton deep inelastic scattering on a polarized nucleon target can provide sensitive information concerning the quark helicity and transversity distributions for both the nucleon and Λ hyperon at large x. Numerical predictions are given for the spin transfers of the produced Λ, when the target nucleon is polarized either longitudinally or transversely, and with the nucleon and Λ quark distributions evaluated both in an SU(6) quark-spectator-diquark model and in a perturbative QCD based model. It is also shown that the predicted spin transfers have different behaviors for proton and neutron targets, and this can provide sensitive tests of different predictions for the quark helicity and transversity distributions of the d valence quark of the proton at large x. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.64.014017
DOI:
10.1103/PhysRevD.64.014017
PACS:
14.20.-c, 13.85.Ni, 13.87.Fh, 13.88.+e
See AlsoErratum: Bo-Qiang Ma, Ivan Schmidt, Jacques Soffer, and Jian-Jun Yang, Erratum: Helicity and transversity distributions of the nucleon and Λ hyperon from Λ fragmentation [Phys. Rev. D 64, 014017 (2001)], Phys. Rev. D 64, 099901 (2001). |
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