On the Parton Interpretation of Quark Fragmentation into Hadrons with Different Spins

1993/10/06 by A. Anselm, M. Anselmino, F. Murgia +1
Physics and Astronomy · #hep-ph

paper · pdf

published as JETP Lett. 60 (1994) 496-504 · 10 pages (no figures), Plain TEX , report DFTT 48/93

arxiv created 1993/10/06 · arxiv updated 2009/11/30

Abstract

We calculate the spin density matrix of the hadron h created via quark fragmentation in the process e^-e⁺ → q q → h + X. In the case of h=Λ the experimental data could possibly elucidate the problem of s-quark contribution to the spin of the Λ-hyperon, to be compared with the case of the proton (``spin crisis''). Generally we find that for hadrons with spin 1/2 the parton description, using only probabilities, works much better than for vector particles, since in the former case the non diagonal matrix elements of the hadron spin density matrix are suppressed by a small factor p_T/(z√ s), where p_T is the hadron transverse momentum inside the jet.

Related

• Inclusive production of hadrons in ℓ^\uparrow p^\uparrow → h^\uparrow X and spin measurements
• Single spin asymmetries in ℓ p^\uparrow → hX and e^-e⁺ → q q → h^\uparrow X
• Hadronization mechanisms and spin effects in high energy fragmentation processes
• Spin Measurements in lp -> hX Deep Inelastic Scattering
• Spin transfer in high energy fragmentation processes