${{\mathit \eta}_{{c}}{(2S)}}$ WIDTH

INSPIRE   PDGID:
M059W
VALUE (MeV) CL% EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 13.9 \pm2.6}$ OUR AVERAGE
$19.8$ $\pm3.9$ $\pm3.1$ 569
ABLIKIM
2022Q
 BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$3( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$9.9$ $\pm4.8$ $\pm2.9$ $57$ $\pm17$
ABLIKIM
2013K
 BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$16.9$ $\pm6.4$ $\pm4.8$ $127$ $\pm18$ 1
ABLIKIM
2012G
 BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}^{0}}{{\mathit K}}{{\mathit \pi}}$ , ${{\mathit K}}{{\mathit K}}{{\mathit \pi}^{0}}$
$13.4$ $\pm4.6$ $\pm3.2$ 624 2
DEL-AMO-SANCH..
2011M
 BABR ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$
$6.6$ ${}^{+8.4}_{-5.1}$ ${}^{+2.6}_{-0.9}$ 128 3
VINOKUROVA
2011
BELL ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{\pm}}$ ( ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ )
$6.3$ $\pm12.4$ $\pm4.0$ 61
ASNER
2004
CLEO ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}^{\,'}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$\text{< 23}$ 90 $98$ $\pm52$ 4
AUBERT
2006E
 BABR ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit X}}$ $_{ {{\mathit c}} {{\overline{\mathit c}}} }$
$22$ $\pm14$ $121$ $\pm27$
AUBERT
2005C
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit c}}{{\overline{\mathit c}}}$
$17.0$ $\pm8.3$ $\pm2.5$ $112$ $\pm24$ 5
AUBERT
2004D
 BABR ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}{(2S)}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$
$\text{<55}$ 90 $39$ $\pm11$ 6
CHOI
2002
BELL ${{\mathit B}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}_{{S}}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$\text{<8.0}$ 95 7
EDWARDS
1982C
 CBAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
1  From a simultaneous fit to ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ and ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ decay modes.
2  Ignoring possible interference with continuum.
3  Accounts for interference with non-resonant continuum.
4  From the fit of the kaon momentum spectrum. Systematic errors not evaluated.
5  Superseded by DEL-AMO-SANCHEZ 2011M.
6  For a mass value of $3654$ $\pm6$ MeV. Superseded by VINOKUROVA 2011 .
7  For a mass value of $3594$ $\pm5$ MeV
References:
ABLIKIM 2022Q
PR D106 032014 Observation of $\eta_c(2S) \to 3(\pi^+\pi^-)$ and measurements of $\chi_{cJ} \to 3(\pi^+\pi^-)$ in $\psi(3686)$ radiative transitions
ABLIKIM 2013K
PR D87 052005 Evidence for ${{\mathit \eta}_{{c}}{(2S)}}$ in ${{\mathit \psi}{(3686)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
ABLIKIM 2012G
PRL 109 042003 First Observation of the $\mathit M$1 Transition ${{\mathit \psi}{(3686)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{c}}{(2S)}}$
DEL-AMO-SANCHEZ 2011M
PR D84 012004 Observation of ${{\mathit \eta}_{{c}}{(1S)}}$ and ${{\mathit \eta}_{{c}}{(2S)}}$ decays to ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ in Two-Photon Interactions
VINOKUROVA 2011
PL B706 139 Study of ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{\pm}}$ ($\mathit KSK{{\mathit \pi}}$) Decay and Determination of ${{\mathit \eta}_{{c}}}$ and ${{\mathit \eta}_{{c}}{(2S)}}$ Parameters
AUBERT 2006E
PRL 96 052002 Measurements of the Absolute Branching Fractions of ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit X}}$ $_{ {{\mathit c}} {{\overline{\mathit c}}} }$
AUBERT 2005C
PR D72 031101 Measurement of Double Charmonium Production in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilations at $\sqrt {s }$ = 10.6 GeV
ASNER 2004
PRL 92 142001 Observation of ${{\mathit \eta}_{{c}}^{\,'}}$ Production in ${{\mathit \gamma}}{{\mathit \gamma}}$ Fusion at CLEO
AUBERT 2004D
PRL 92 142002 Measurements of the Mass and Width of the ${{\mathit \eta}_{{c}}}$ Meson and of an ${{\mathit \eta}_{{c}}{(2S)}}$ Candidate
CHOI 2002
PRL 89 102001 Observation of the ${{\mathit \eta}_{{c}}{(2S)}}$ in Exclusive ${{\mathit B}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}_S^0}$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}$ Decays
EDWARDS 1982C
PRL 48 70 Observation an ${{\mathit \eta}_{{c}}^{\,'}}$ Candidate State with Mass $3592$ $\pm5$ MeV