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${{\mathit a}_{{0}}{(1950)}}$ MASS

INSPIRE   PDGID:

M227M

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $1931$ $\pm14$ $\pm22$ 12k 1, 2 LEES 2016 A BABR ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}}$(1 ${{\mathit S}}$) $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1949$ $\pm32$ $\pm76$ 8k 1 LEES 2016 A BABR ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}}$(1 ${{\mathit S}}$) $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ $1927$ $\pm15$ $\pm23$ 4k 1 LEES 2016 A BABR ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}}$(1 ${{\mathit S}}$) $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ 1  From a model-independent partial wave analysis fit to a relativistic Breit-Wigner function with a floating width. 2  Weighted average of the ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}$ and ${{\mathit K}^{+}}{{\mathit K}^{-}}$ decay modes.

References:

LEES 2016A PR D93 012005 Measurement of the I=1/2 ${{\mathit K}}{{\mathit \pi}}$ $\mathit S$-Wave Amplitude from Dalitz Plot Analyses of ${{\mathit \eta}_{{c}}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ in Two-Photon Interactions