Unitary coupled channel analysis of the {lambda}(1520) resonance

Journal Article · Sat Apr 15 04:00:00 EDT 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.045208· OSTI ID:20771487

Roca, L; Sarkar, Sourav; Magas, V K; Oset, E ^[1]

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1. Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, E-46071 Valencia (Spain)

We study the {lambda}(1520) resonance in a coupled-channel approach involving the {pi}{sigma}(1385),K{xi}(1530),KN, and {pi}{sigma} channels. Implementing unitarity in coupled channels, we make an analysis of the relative importance of the different mechanisms that contribute to the dynamical structure of this resonance. From experimental information on some partial wave amplitudes and constraints imposed by unitarity, we get a comprehensive description of the amplitudes and hence the couplings to the different channels. We test these amplitudes in different reactions like K{sup -}p{yields}{lambda}{pi}{pi},{gamma}p{yields}K{sup +}K{sup -}p,{gamma}p{yields}K{sup +}{pi}{sup 0}{pi}{sup 0}{lambda}, and {pi}{sup -}p{yields}K{sup 0}K{sup -}p and find a fair agreement with the experimental data.

• OSTI ID: 20771487
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
COUPLED CHANNEL THEORY
KAONS MINUS
KAONS PLUS
LAMBDA-1520 BARYONS
PARTIAL WAVES
PHOTON-PROTON INTERACTIONS
PION-PROTON INTERACTIONS
PIONS MINUS
PIONS NEUTRAL
SIGMA-1385 BARYONS
UNITARITY
XI-1530 BARYONS