Composite nature of the Lambda (1520) resonance
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Composite nature of the Lambda (1520) resonance

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Composite nature of the Lambda (1520) resonance

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Aceti, Francesca; Oset Báguena, Eulogio Perfil; Roca Zamora, Luis
Aquest document és un/a article, creat/da en: 2014
Recently, the Weinberg compositeness condition of a bound state was generalized to account for resonant states and higher partial waves. We apply this extension to the case of the Lambda (1520) resonance and quantify the weight of the meson-baryon components in contrast to other possible genuine building blocks. This resonance was theoretically obtained from a coupled channels analysis using the s-wave pi Sigma* and K Xi* and the d-wave (K) over bar N and pi Sigma channels, applying the techniques of the chiral unitary approach. We obtain the result that this resonance is essentially dynamically generated from these meson-baryon channels, leaving room for only 15% weight of other kinds of components in its wave function.

    Aceti, Francesca Oset Báguena, Eulogio Roca Zamora, Luis 2014 Composite nature of the Lambda (1520) resonance Physical Review C 90 2 025208-1 025208-8
http://dx.doi.org/10.1103/PhysRevC.90.025208
distribuït sota llicència Creative Commons de Reconeixement-NoComercial 3.0 No adaptada

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