${{\mathit \phi}{(2240)}}$ WIDTH INSPIRE search

M274W
VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ 129 \pm12}$ OUR AVERAGE
$153$ $\pm54$ $\pm76$ 1
AFZAL
2026
GLUX $>$ 8 $\gamma p \to \phi\pi^+\pi^-p$
$86$ $\pm44$ $\pm51$ 2
ABLIKIM
2021AP
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$
$127$ $\pm14$ $\pm4$ 3
LEES
2020
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$139.8$ $\pm12.3$ $\pm20.6$
ABLIKIM
2019L
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$86.1$ $\pm9.2$ 4
CHEN
2025D
 RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ , ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$
$70$ $\pm38$ 5
LEES
2020
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \gamma}}$
1  $J^{PC}$ not determined.
2  ABLIKIM 2021AP fit to the cross section between 2.00 and 3.08 GeV with a sum of Breit-Wigner amplitude and a nonresonant contribution.
3  LEES 2020 fit to the BABAR data of LEES 2013Q and BESIII data of ABLIKIM 2019L assuming a coherent sum of a single Breit-Wigner resonance and a non-resonant contribution.
4  CHEN 2025D combined analysis of the cross sections for ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ using data from ABLIKIM 2019L and ABLIKIM 2021AP. The parametrisation includes CHEN 2025D the interference between direct coupling process and resonance intermediate process with the isospin factor fixed to one. Other solutions which include additional vector resonances give $85.9$ $\pm8.6$ MeV and $86.4$ $\pm8.9$ MeV.
5  LEES 2020 fit to the BABAR data of LEES 2013Q assuming a coherent sum of a single Breit-Wigner resonance and a non-resonant contribution. The resonance significance is 3.5 ${{\mathit \sigma}}$.
  References:
AFZAL 2026
PRL 136 251902 Search for the $Y(2175)$ in the photoproduction cross section measurement of $?p \to ??^{+} ?^{-} p$ at GlueX
CHEN 2025D
EPJ C85 1388 A combined analysis of $Y(2240)$ in the $e^+ e^- \to K^+ K^-$ and $e^+ e^- \to K_S^0 K_L^0$ processes
ABLIKIM 2021AP
PR D104 092014 Cross section measurement of $e^{+}e^{-} \to K_{S}^{0}K_{L}^{0}$ at $\sqrt{s}=2.00-3.08~{GeV}$
LEES 2020
PR D101 012011 Resonances in $e^+e^-$ annihilation near 2.2 GeV
ABLIKIM 2019L
PR D99 032001 Measurement of $e^{+} e^{-} \rightarrow K^{+} K^{-}$ cross section at $\sqrt{s} = 2.00 - 3.08$ GeV