2004/01/27 by Yu. N. Uzikov · 11 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Baryon #Hyperon #Lambda #Nucleon #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Pentaquark #Physics #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.physletb.2004.06.041
published in Physics Letters B 595(1-4), 277-282 (Elsevier BV) · 8 pages, Latex . The spin 3/2 of the $Θ^+$ and a discrimination for the isospin T=0,1 and 2 are briefly discussed; minor corrections are performed
arxiv created 2004/01/27 · openalex publication_date 2004/06/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Spin structure of the reaction N → N → → Y → Θ is analyzed at the threshold in a model independent way for an arbitrary spin of the Θ + . We found that the sign of the spin–spin correlation parameter C x , x being measured in a double-spin experiment, determines the P-parity of the Θ + unambiguously. Furthermore we show that the polarization transfer from a nucleon to the final hyperon Y is zero or non-zero strictly depending on the P-parity of the Θ + and the total isospin of the NN system. It allows one to determine the P-parity of the Θ + in a single-spin measurement, since the polarization of the Y can be measured via its weak decay.