Eur. Phys. J. A (2006) 27: 373-380
https://doi.org/10.1140/epja/i2006-10009-9

Hadron Physics

Testing the nature of the Λ(1520)-resonance in proton-induced production

¹ Departamento de Fısica, Universidad de Murcia, E-30100, Murcia, Spain
² Forschungszentrum Jülich, Institut für Kernphysik (Theorie), D-52425, Jülich, Germany
³ Departamento de Fısica Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptdo. 22085, 46071, Valencia, Spain
⁴ HISKP (Th), Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany

^* e-mail: luisroca@um.es

Received: 6 February 2006
Accepted: 1 April 2006
Published online: 3 May 2006

Abstract

The Λ(1520)-resonance has been recently studied in a unitarized coupled-channel formalism with πΣ(1385), KΞ(1530), ¯N and πΣ as constituents blocks. We provide a theoretical study of the predictions of this model in physical observables of the pp → pK ⁺ K ^- p and pp → pK ⁺π⁰π⁰Λ reactions. In particular, we show that the ratio between the π⁰π⁰Λ and K^-p mass distributions can provide valuable information on the ratio of the couplings of the Λ(1520)-resonance to πΣ(1385) and ¯N than the theory predicts. Calculations are done for energies which are accessible in an experimental facility like COSY at Jülich or the developing CSR facility at Lanzhou.