2006/06/16 by The BABAR Collaboration, B. Aubert, R. Barate +98
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Lambda #Omega #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spin (aerodynamics) #Thermodynamics #hep-ex
paper · pdf · doi:10.1103/physrevlett.97.112001
published as Phys.Rev.Lett.97:112001,2006 · 7 pages, 6 postscript figures, submitted to Phys. Rev. Lett
arxiv created 2006/06/16 · openalex publication_date 2006/09/12 · arxiv updated 2010/03/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
A measurement of the spin of the \ensuremathΩ^\ensuremath- hyperon produced through the exclusive process \ensuremathΞc0\ensuremath→\ensuremathΩ^\ensuremath-K+ is presented using a total integrated luminosity of 116 fb^\ensuremath-1 recorded with the BABAR detector at the e+e^\ensuremath- asymmetric-energy B factory at SLAC. Under the assumption that the \ensuremathΞc0 has spin 1/2, the angular distribution of the \ensuremathΛ from \ensuremathΩ^\ensuremath-\ensuremath→\ensuremathΛK^\ensuremath- decay is inconsistent with all half-integer \ensuremathΩ^\ensuremath- spin values other than 3/2. Lower statistics data for the process \ensuremathΩc0\ensuremath→\ensuremathΩ^\ensuremath-\ensuremathπ+ from a 230 fb^\ensuremath-1 sample are also found to be consistent with \ensuremathΩ^\ensuremath- spin 3/2. If the \ensuremathΞc0 spin were 3/2, an \ensuremathΩ^\ensuremath- spin of 5/2 could not be excluded.