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${{\mathit \eta}{(1405)}}$ MASS

${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ MODE ( ${{\mathit a}_{{0}}{(980)}}{{\mathit \pi}}$ or direct ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ )

INSPIRE   PDGID:

M027M4

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 1413.9 \pm1.7}$ OUR AVERAGE  Error includes scale factor of 1.1. $1413$ $\pm14$ 3651 1 NICHITIU 2002 OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $1416$ $\pm4$ $\pm2$ 20k ADAMS 2001 B B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ $1405$ $\pm5$ 2 CICALO 1999 OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit K}_S^0}$ ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $1407$ $\pm5$ 2 BERTIN 1997 OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}$( ${{\mathit K}^{0}}$) ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $1416$ $\pm2$ 2 BERTIN 1995 OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit \pi}}{{\mathit \pi}}$ $1416$ $\pm8$ ${}^{+7}_{-5}$ 700 3 BAI 1990 C MRK3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ $1413$ $\pm5$ 3 RATH 1989 MPS 21.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1459$ $\pm5$ 4 AUGUSTIN 1992 DM2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ 1  Decaying dominantly directly to ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ . 2  Decaying into ( ${{\mathit K}}{{\overline{\mathit K}}}$ )$_{\mathit S}{{\mathit \pi}}$, ( ${{\mathit K}}{{\mathit \pi}}$ )$_{\mathit S}{{\overline{\mathit K}}}$, and ${{\mathit a}_{{0}}{(980)}}{{\mathit \pi}}$ . 3  From fit to the ${{\mathit a}_{{0}}{(980)}}{{\mathit \pi}}$ ${}^{}0{}^{-+}$ partial wave. Cannot rule out a ${{\mathit a}_{{0}}{(980)}}{{\mathit \pi}}$ ${}^{}1{}^{++}$ partial wave. 4  Excluded from averaging because averaging would be meaningless.

References:

NICHITIU 2002 PL B545 261 Study of the ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ Final State in Antiproton Annihilation at Rest if Gaseous Hydrogen at NTP with the OBELIX Spectrometer ADAMS 2001B PL B516 264 Observation of Pseudoscalar and Axial Vector Resonances in ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ at 18 GeV CICALO 1999 PL B462 453 Evidence for Two Pseudoscalar States in the 1.4 to 1.5 GeV Mass Region BERTIN 1997 PL B400 226 A Search for Axial Vectors in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit K}^{0}}$ $_{miss}$ ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Annihilations at Rest in Gaseous Hydrogen at NTP BERTIN 1995 PL B361 187 $\mathit E/\iota $ Decays to ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation at Rest AUGUSTIN 1992 PR D46 1951 Partial Wave Analysis of DM2 Data in the ${{\mathit \eta}{(1430)}}$ Energy Range BAI 1990C PRL 65 2507 Partial Wave Analysis of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\pm}}$ RATH 1989 PR D40 693 The ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$ System Produced in ${{\mathit \pi}^{-}}{{\mathit p}}$ Interactions at 21.4 ${\mathrm {GeV/}}\mathit c$

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