pdgLive Home   >   ${\mathit {\mathit c}}{\mathit {\overline{\mathit c}}}$ MESONS (including possibly non-${\mathit {\mathit q}}{\mathit {\overline{\mathit q}}}$ states)   >   ${{\mathit \psi}{(3770)}}$   >   ${\mathit m}_{{{\mathit \psi}{(3770)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$

${\mathit m}_{{{\mathit \psi}{(3770)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$

INSPIRE   PDGID:

M053DM

OUR FIT includes measurements of ${\mathit m}_{{{\mathit \psi}{(2S)}}}$, ${\mathit m}_{{{\mathit \psi}{(3770)}}}$, and ${\mathit m}_{{{\mathit \psi}{(3770)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$.

VALUE (MeV) DOCUMENT ID TECN  COMMENT $\bf{ 87.6 \pm0.4}$ OUR FIT  Error includes scale factor of 1.4. $\bf{ 86.6 \pm0.7}$ OUR AVERAGE  Error includes scale factor of 2.0.  See the ideogram below. $86.9$ $\pm0.4$ 1 ABLIKIM 2007 E BES2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $86.7$ $\pm0.7$ ABLIKIM 2006 L BES2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $80$ $\pm2$ SCHINDLER 1980 MRK2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $86$ $\pm2$ 2 BACINO 1978 DLCO ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $88$ $\pm3$ RAPIDIS 1977 LGW ${{\mathit e}^{+}}{{\mathit e}^{-}}$ 1  BES-II ${{\mathit \psi}{(2S)}}$ mass subtracted (see ABLIKIM 2006L). 2  SPEAR ${{\mathit \psi}{(2S)}}$ mass subtracted (see SCHINDLER 1980 ).

${\mathit m}_{{{\mathit \psi}{(3770)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$ (MeV)

References:

ABLIKIM 2007E PL B652 238 Precision Measurements of the Mass, the Widths of ${{\mathit \psi}{(3770)}}$ Resonance and the Cross Section $\sigma\mathrm {( {{\mathit e}^{+}} {{\mathit e}^{-}} \rightarrow {{\mathit \psi}{(3770)}} )}$ at $\mathit E_{{\mathrm {cm}}}$ = 3.7724 GeV 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 ${{\mathit \psi}{(2S)}}$ SCHINDLER 1980 PR D21 2716 Measurement of the Parameters of the ${{\mathit \psi}{(2S)}}$ Resonance BACINO 1978 PRL 40 671 Observation of a Peak in Hadron and Weak Electron Production in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilation at $\mathit E_{{\mathrm {cm}}}$ 3770 MeV RAPIDIS 1977 PRL 39 526 Observation of a Resonance in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilation just above Charm Threshold