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STRANGE MESONS ($\mathit S$ = $\pm1$, $\mathit C$ = $\mathit B$ = 0) ${{\mathit K}^{+}}$ = ${\mathit {\mathit u}}$ ${\mathit {\overline{\mathit s}}}$, ${{\mathit K}^{0}}$ = ${\mathit {\mathit d}}$ ${\mathit {\overline{\mathit s}}}$, ${{\overline{\mathit K}}^{0}}$ = ${\mathit {\overline{\mathit d}}}$ ${\mathit {\mathit s}}$, ${{\mathit K}^{-}}$ = ${\mathit {\overline{\mathit u}}}$ ${\mathit {\mathit s}}$, similarly for ${{\mathit K}^{*}}$'s

INSPIRE   JSON PDGID: M160

${{\mathit K}{(1630)}}$ $I(J^P)$ = $1/2(?^{?})$

Seen as a narrow peak, compatible with the experimental resolution, in the invariant mass of the ${{\mathit K}_S^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ system produced in ${{\mathit \pi}^{-}}{{\mathit p}}$ interactions at high momentum transfers.

${{\mathit K}{(1630)}}$ MASS $1629$ $\pm7$ MeV

${{\mathit K}{(1630)}}$ WIDTH $16^{+19}_{-16}$ MeV

${{\mathit K}{(1630)}}$ DECAY MODES
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ 709