2007/11/22 by H. Toki, Hiroshi Toki, C. García-Recio +3 · 1 citation
Physics and Astronomy · #Coupling (piping) #Energy (signal processing) #Hadron #High-Energy Particle Collisions Research #Lambda #Materials science #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #hep-ph
paper · pdf · doi:10.1103/physrevd.77.034001
published as Phys.Rev.D77:034001,2008 · 20 pages and 6 pages
arxiv created 2007/11/22 · openalex publication_date 2008/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the photon induced \ensuremathΛ(1520) production in the effective Lagrangian method near threshold, E_\ensuremathγLAB\ensuremath≤2 GeV, and in the quark-gluon string model at higher energies 3 GeV\ensuremath≤E_\ensuremathγLAB\ensuremath≤5 GeV. In particular, we study the role of the K* exchange for the production of \ensuremathΛ(1520) within the SU(6) Weinberg-Tomozowa chiral unitary model proposed by Garc'\ia-Recio, Nieves, and Salcedo [Phys. Rev. D 74, 034025 (2006)]. The coupling of the \ensuremathΛ(1520) resonance to the NK* pair, which is dynamically generated, turns out to be relatively small and, thus, the K exchange mechanism dominates the reaction. In the higher energy region, where experimental data are available, the quark-gluon string mechanism with the K Regge trajectory reproduces both the energy and the angular distribution dependences of the \ensuremathΛ(1520) photoproduction reaction.