Lambda polarization in polarized proton-proton collisions at BNL RHIC

2000/02/08 by C. Boros, J. T. Londergan, A. W. Thomas · 2 citations
Chemistry · Physics and Astronomy · #Chemistry #Fragmentation (computing) #High-Energy Particle Collisions Research #Lambda #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Polarization (electrochemistry) #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Sigma #hep-ph

paper · pdf · doi:10.1103/physrevd.62.014021

published as Phys.Rev.D62:014021,2000 · 18 pages, 5 figures

arxiv created 2000/02/08 · openalex publication_date 2000/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We discuss \ensuremathΛ polarization in inclusive proton-proton collisions, with one of the protons longitudinally polarized. The hyperfine interaction responsible for the \ensuremathΔ\ensuremath-N and \ensuremathΣ\ensuremath-\ensuremathΛ mass splittings gives rise to flavor asymmetric fragmentation functions and to sizable polarized non-strange fragmentation functions. We predict large positive \ensuremathΛ polarization in polarized inclusive proton-proton collisions at large rapidities of the produced \ensuremathΛ. The effect of \ensuremathΣ⁰ and \ensuremathΣ^* decays is also discussed. Forthcoming experiments at RHIC will be able to test our predictions.

Citations

• Polarizedq→Λ fragmentation functions frome+e−→Λ + X
• Structure and production of lambda baryons
• Spin content ofΛand its longitudinal polarization ine+e−annihilation at high energies
• Parton distributions for the octet and decuplet baryons
• Novel quark fragmentation functions and the nucleon’s transversity distribution

Cited by

• Quark to Λ -hyperon spin transfers in the current-fragmentation region
• Quark distributions of octet baryons from SU(3) symmetry