${{\mathit \psi}{(4660)}}$ WIDTH

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 72 {}^{+14}_{-12}}$ OUR AVERAGE  Error includes scale factor of 1.7. See the ideogram below.
$155.4$ $\pm24.8$ $\pm0.8$ 1
 2021 AJ
BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$
$47.0$ ${}^{+31.3}_{-14.8}$ $\pm4.6$ 66 2
 2020
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit D}_{{s}}^{+}}{{\mathit D}_{{s2}}^{*}{(2573)}^{-}}$
$49.8$ ${}^{+13.9}_{-11.5}$ $\pm4.0$ 89 3
 2019 A
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit D}_{{s}}^{+}}{{\mathit D}_{{s1}}{(2536)}^{-}}$
$68$ $\pm11$ $\pm5$ 279 4
 2015 A
BELL 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$
$104$ $\pm48$ $\pm10$ 37 5
 2014 F
BABR 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$
$92$ ${}^{+40}_{-24}$ ${}^{+10}_{-21}$ 142 6
 2008 B
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \Lambda}_{{c}}^{-}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$62.6$ $\pm5.6$ $\pm4.3$ 7
 2017
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \Lambda}_{{c}}^{-}}$
$113.8$ $\pm18.1$ $\pm3.4$ 8
 2017 B
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$
$103.5$ $\pm15.6$ $\pm4.0$ 9
 2017 C
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ or ${{\mathit \psi}{(2S)}}$
$42$ ${}^{+17}_{-12}$ $\pm6$ 44 10
 2008 H
RVUE 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$
$48$ $\pm15$ $\pm3$ 44
 2007 D
BELL 10.58 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$
 1 From a three-resonance fit to the Born cross section in the range $\sqrt {s }$ = $4.008 - 4.698$ GeV.
 2 Using ${{\mathit D}_{{s2}}^{*}{(2573)}^{-}}$ $\rightarrow$ ${{\overline{\mathit D}}^{0}}{{\mathit K}^{-}}$ decays.
 3 From a fit of a Breit-Wigner convolved with a Gaussian.
 4 From a two-resonance fit. Supersedes WANG 2007D.
 5 From a two-resonance fit.
 6 The ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ and ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \Lambda}_{{c}}^{-}}$ states are not necessarily the same.
 7 The pole parameters are extracted from the speed plot.
 8 From a three-resonance fit.
 9 From a combined fit of BELLE, BABAR and BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ data.
 10 From a combined fit of AUBERT 2007S and WANG 2007D data with two resonances.

${{\mathit \psi}{(4660)}}$ WIDTH (MeV)
References:
 ABLIKIM 2021AJ
PR D104 052012
 JIA 2020
PR D101 091101 Evidence for a vector charmoniumlike state in $e^+e^- \to D^+_sD^*_{s2}(2573)^-+c.c.$
 JIA 2019A
PR D100 111103 Observation of a vector charmoniumlike state in $e^+e^- \to D^+_sD_{s1}(2536)^-+c.c.$
 DAI 2017
PR D96 116001 Re-examining the ${{\mathit X}{(4630)}}$ Resonance in the Reaction ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}_{{c}}^{+}}{{\overline{\mathit \Lambda}}_{{c}}^{-}}$
 ZHANG 2017B
PR D96 054008 Revisiting the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(3686)}}$ Line Shape
 ZHANG 2017C
EPJ C77 727 Combined Fit to the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(3686)}}$ Line Shape
 WANG 2015A
PR D91 112007 Measurement of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ via Initial State Radiation at Belle
 LEES 2014F
PR D89 111103 Study of the Reaction ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ via Initial-State Radiation at BaBar
 LIU 2008H
PR D78 014032 Combined Fit to BABAR and Belle Data on ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$
 PAKHLOVA 2008B
PRL 101 172001 Observation of a Near-Threshold Enhancement in the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}_{{c}}^{+}}{{\mathit \Lambda}_{{c}}^{-}}$ Cross Section using Initial-State Radiation
 WANG 2007D
PRL 99 142002 Observation of Two Resonant Structures in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \psi}{(2S)}}$ via Initial-State Radiation at Belle