Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-13
Phys.Rev. D64 (2001) 014017; Erratum-ibid. D64 (2001) 099901
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 latex pages, 4 figures, published in PRD64, 014017 (2001), Erratum added concerning a wrong comparison with data, published
Scientific paper
10.1103/PhysRevD.64.014017
It is shown that $\Lambda$-hyperon fragmentation in charged lepton deep inelastic scattering (DIS) on a polarized nucleon target can provide sensitive information concerning the quark helicity and transversity distributions for both nucleon and $\Lambda$-hyperon at large $x$. Numerical predictions are given for the spin transfers of the produced $\Lambda$, when the target nucleon is polarized either longitudinally or transversely, and with the nucleon and $\Lambda$ quark distributions evaluated both in an SU(6) quark-spectator-diquark model and in a perturbative QCD (pQCD) 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 $x$.
Ma Bo-Qiang
Schmidt Ivan
Soffer Jacques
Yang Jian-Jun
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