2004/10/03 by W. Roberts, Winston Roberts, T. Oed +1 · 4 citations
Physics and Astronomy · #Baryon #Helicity #High-Energy Particle Collisions Research #Meson #Nuclear physics #Nucleon #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Polarization (electrochemistry) #Production (economics) #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spin (aerodynamics) #nucl-th
paper · pdf · doi:10.1103/physrevc.71.055201
published as Phys.Rev.C71:055201,2005 · 20 pages, using revtex4
arxiv created 2004/10/03 · openalex publication_date 2005/05/06 · arxiv updated 2014/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We develop polarization observables for the processes \ensuremathγN\ensuremath→\ensuremathπ\ensuremathπN and \ensuremathπN\ensuremath→\ensuremathπ\ensuremathπN, using both a helicity and hybrid helicity-transversity basis. Such observables are crucial if processes that produce final states consisting of a spin-1/2 baryon and two pseudoscalar mesons are to be fully exploited for baryon spectroscopy. We derive relationships among the observables, as well as inequalities that they must satisfy. We also discuss the observables that must be measured in ``complete'' experiments and briefly examine the prospects for measurement of some of these observables in the near future.