Spin, parity, and nature of the Xi(1620) resonance
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Spin, parity, and nature of the Xi(1620) resonance

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Spin, parity, and nature of the Xi(1620) resonance

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Ramos Gómez, Àngels; Oset Báguena, Eulogio Perfil; Bennhold, Cornelius
Aquest document és un/a article, creat/da en: 2002
Using a unitary extension of chiral perturbation theory with a lowest-order s-wave SU(3) chiral Lagrangian we study low-energy meson-baryon scattering in the strangeness S=-2 sector. A scattering-matrix pole is found around 1605 MeV which corresponds to an s-wave Xi resonance with J(P)=1/2(-). We identify this resonance with the Xi(1620) state, quoted by the Particle Data Group with I=1/2 but with unknown spin and parity. The addition of the S=-2 state to the recently computed Lambda(1670), Sigma(1620), and N(1535) states completes the octet of J(P)=1/2(-) resonances dynamically generated in this chiral unitary approach.

    Ramos Gómez, Àngels Oset Báguena, Eulogio Bennhold, Cornelius 2002 Spin, parity, and nature of the Xi(1620) resonance Physical Review Letters 89 25 252001
http://dx.doi.org/10.1103/PhysRevLett.89.252001
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