Photon induced Lambda (1520) production and the role of the K* exchange
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Photon induced Lambda (1520) production and the role of the K* exchange

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Photon induced Lambda (1520) production and the role of the K* exchange

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Toki, Hiroshi; García Recio, Carmen; Nieves Pamplona, Juan Miguel
Aquest document és un/a article, creat/da en: 2008
We study the photon induced Lambda(1520) production in the effective Lagrangian method near threshold, E(gamma)(LAB)<= 2 GeV, and in the quark-gluon string model at higher energies 3 GeV <= E(gamma)(LAB)<= 5 GeV. In particular, we study the role of the K(*) exchange for the production of Lambda(1520) within the SU(6) Weinberg-Tomozowa chiral unitary model proposed by Garcia-Recio, Nieves, and Salcedo [Phys. Rev. D 74, 034025 (2006)]. The coupling of the Lambda(1520) resonance to the N (K) over bar* 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 Lambda(1520) photoproduction reaction.

    Toki, Hiroshi García Recio, Carmen Nieves Pamplona, Juan Miguel 2008 Photon induced Lambda (1520) production and the role of the K* exchange Physical Review D 77 3 034001
http://dx.doi.org/10.1103/PhysRevD.77.034001
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