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${{\mathit \Xi}}$ BARYONS ($\mathit S$ = $-2$, $\mathit I$ = 1/2) ${{\mathit \Xi}^{0}}$ = ${\mathit {\mathit u}}$ ${\mathit {\mathit s}}$ ${\mathit {\mathit s}}$, ${{\mathit \Xi}^{-}}$ = ${\mathit {\mathit d}}$ ${\mathit {\mathit s}}$ ${\mathit {\mathit s}}$

INSPIRE   JSON PDGID: B021

${{\mathit \Xi}{(1620)}}$ $I(J^P)$ = $1/2(?^{?})$ J, P need confirmation.

The clearest evidence is a peak in ${{\mathit \Xi}^{-}}{{\mathit \pi}^{+}}$ seen by SUMIHAMA 2019. Older low-statistics experiments (e.g., BORENSTEIN 1972 and HASSALL 1981) have looked for the state but have not seen any effect.

${{\mathit \Xi}{(1620)}}$ MASS ~1620 MeV

${{\mathit \Xi}{(1620)}}$ WIDTH $32^{+8}_{-9}$ MeV (S = 2.2)

${{\mathit \Xi}{(1620)}}$ DECAY MODES
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \Xi}}{{\mathit \pi}}$ 248