# ${{\boldsymbol \psi}{(2S)}}$ WIDTH INSPIRE search

VALUE (keV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 294 \pm8}$ OUR FIT
$\bf{ 286 \pm16}$ OUR AVERAGE
$358$ $\pm88$ $\pm4$
 2008 B
BES2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$290$ $\pm25$ $\pm4$ 2.7k
 2007
E835 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ , ${{\mathit J / \psi}}{{\mathit X}}$
$331$ $\pm58$ $\pm2$
 2006 L
BES2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$264$ $\pm27$ 1
 2002 B
BES2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$
$287$ $\pm37$ $\pm16$ 2
 1993 B
E760 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$
1  From a simultaneous fit to the hadronic and ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ cross section, assuming $\Gamma$ = $\Gamma _{{{\mathit h}}}$ $+$ $\Gamma _{{{\mathit e}}}$ $+$ $\Gamma _{{{\mathit \mu}}}$ $+$ $\Gamma _{{{\mathit \tau}}}$ and lepton universality. Does not include vacuum polarization correction.
2  The initial-state radiation correction reevaluated by ANDREOTTI 2007 in its Ref. [4].
References:
 ABLIKIM 2008B
PL B659 74 Direct Measurements of the Cross Sections for ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons (non- ${{\mathit D}}{{\overline{\mathit D}}}$ ) in the Range from 3.65 to 3.87 GeV and the Branching Fraction for ${{\mathit \psi}{(3770)}}$ $\rightarrow$ non- ${{\mathit D}}{{\overline{\mathit D}}}$
 ANDREOTTI 2007
PL B654 74 Precision Measurements of the Total and Partial Widths of the ${{\mathit \psi}{(2S)}}$ Charmonium Meson with a new Complementary-Scan Technique in ${{\overline{\mathit p}}}{{\mathit p}}$ Source Annihilations
 ABLIKIM 2006L
PRL 97 121801 Measurements of the Branching Fractions for ${{\mathit \psi}{(3770)}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ , ${{\mathit D}^{+}}{{\mathit D}^{-}}$, ${{\mathit D}}{{\overline{\mathit D}}}$, and the Resonance Parameters of ${{\mathit \psi}{(3770)}}$ and ${{\mathit \psi}{(2S)}}$
 BAI 2002B
PL B550 24 A Measurement of ${{\mathit \psi}{(2S)}}$ Resonance Parameters
 ARMSTRONG 1993B
PR D47 772 Measurement of the ${{\mathit J / \psi}}$ and ${{\mathit \psi}^{\,'}}$ Resonance Parameters in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation
see fit info