${{\mathit a}_{{{0}}}{(980)}}$ MASS

${{\mathit K}}{{\overline{\mathit K}}}$ ONLY

INSPIRE   JSON  (beta) PDGID:
M036M2
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$947.7$ ${}^{+5.5}_{-5.0}$ $\pm6.6$ 1
AAIJ
2019H
 LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit D}^{\pm}}{{\mathit X}}$
$925$ $\pm5$ $\pm8$ 190k 2
AAIJ
2016N
 LHCB ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$
$\sim{}\text{ 1053}$ 3
OLLER
1999C
 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$
$975$ $\pm15$
BERTIN
1998B
 OBLX 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit K}_{{{s}}}}{{\mathit \pi}^{\mp}}$
$970$ $\pm10$ 316
DEBILLY
1980
HBC 1.2$-$2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit f}_{{{1}}}{(1285)}}{{\mathit \omega}}$
$1016$ $\pm10$ 100 4
ASTIER
1967
HBC 0.0 ${{\overline{\mathit p}}}{{\mathit p}}$
$1003.3$ $\pm7.0$ 143 5, 6
ROSENFELD
1965
RVUE
1  From the${{\mathit D}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ Dalitz plot fit with the Triple-M amplitude in the multimeson model of AOUDE 2018.
2  Using a two-channel resonance parametrization with couplings fixed to ABELE 1998.
3  T-matrix pole.
4  ASTIER 1967 includes data of BARLOW 1967, CONFORTO 1967, ARMENTEROS 1965.
5  Note on $\mathit J{}^{P}$. Main argument for $0{}^{+}{}^{}$ is small $\mathit Q$ value. Isotropy of decay distribution in ${{\overline{\mathit p}}}{{\mathit p}}$ at rest proves nothing. See discussion by Rosenfeld (Oxford) and Butterworth (Heidelberg).
6  Plus systematic errors.
References