1996/03/28 by Paul Singer, Da-Xin Zhang · 2 citations
Physics and Astronomy · #B meson #Baryon #Branching fraction #Charmed baryons #Coupling constant #Factorization #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Radiative transfer #Vector meson #hep-ph
paper · pdf · doi:10.1103/physrevd.54.1225
published as Phys.Rev. D54 (1996) 1225-1228 · 11 pages, latex, no figures
arxiv created 1996/03/28 · openalex publication_date 1996/07/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The heavy quark effective theory and the factorization approximation are used to treat the Cabibbo-suppressed decays of charmed baryons to vector mesons, \ensuremathΛC\ensuremath→p\ensuremathρ0, p\ensuremathω, \ensuremathΞC+,0\ensuremath→\ensuremathΣ+,0\ensuremathφ, \ensuremathΣ+,0\ensuremathρ0, \ensuremathΣ+,0\ensuremathω, and \ensuremathΞC0\ensuremath→\ensuremathΛ\ensuremathφ, \ensuremathΛ\ensuremathρ, \ensuremathΛ\ensuremathω. The input from two recent experimental results on \ensuremathΛC decays allows the estimation of the branching ratios for these modes, which turn out to be between 10^\ensuremath-4 and 10^\ensuremath-3. The long distance contribution of these transitions via vector meson dominance to the radiative weak processes \ensuremathΛC\ensuremath→p\ensuremathγ, \ensuremathΞC\ensuremath→\ensuremathΣ\ensuremathγ, and \ensuremathΞC0\ensuremath→\ensuremathΛ\ensuremathγ leads to quite small branching ratios, 10^\ensuremath-6-10^\ensuremath-9; the larger value holds if a sum rule between the coupling constants of the vector mesons is broken.