Measurement of the branching fraction for $\psi (3770)\to \gamma {\chi }_{c0}$

Abstract

By analyzing a data set of 2.92 fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data taken at $\sqrt{s}=3.773\mathrm{GeV}$ and 106.41$\times 10^6$ $\psi (3686)$ decays taken at $\sqrt{s}=3.686\mathrm{GeV}$ with the BESIII detector at the BEPCII collider, we measure the branching fraction and the partial decay width for $\psi (3770)\to \gamma {\chi }_{c0}$ to be $\mathcal{B}(\psi (3770)\to \gamma {\chi }_{c0})=(6.88\pm 0.28\pm 0.67)\times 10^{-3}$ and $\Gamma [\psi (3770)\to \gamma {\chi }_{c0}]=(187\pm 8\pm 19)\mathrm{keV}$, respectively. These are the most precise measurements to date.

arXiv comment11 pages, 2 figures

References in corpus (31)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Big-Bang Nucleosynthesis
• Heavy quarkonium: progress, puzzles, and opportunities
• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Higher Charmonia
• Charmonium
• Quarkonia and their transitions
• Charmonium levels near threshold and the narrow state $X(3872) \to π^{+}π^{-}\jpsi$
• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• Charmless Final States and S--D-wave mixing in the ${\psi }^{\prime \prime }$
• Measurements of the cross sections for $e^{+}{e}^{-}\to \mathrm{hadrons}$ at 3.650, 3.6648, 3.773 GeV and the branching fraction for $\psi (3770)\to \mathrm{non}-D\bar{D}$
• Measurements of the braching fractions for psi(3770)--> D0D0-bar,D+D-,DD-bar$ and the resonance parameters of psi(3770) and psi(2S)
• Measurement of sigma(e^+e^- --> psi(3770) --> hadrons) at E_{cm}=3773 MeV
• Observation of psi(3770) --> gamma chi_c0
• Observation of a ppb mass threshoud enhancement in ψ^\prime\toπ^+π^-J/ψ(J/ψ\toγp\bar{p}) decay
• Study of a0(980)--f0(980) mixing
• Determination of the number of ${\psi }^{\prime }$ event at BESIII
• Psi'' decays to charmless final states
• Photon Transitions in ψ(2S) Decays to χ_{cJ}(1P) and η_c(1S)
• First Observation of psi(3770) --> gamma chi_{c1} --> gamma gamma J/psi
• Measurement of the Matrix Element for the Decay ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$
• Heavy Quarkonium
• Evidence for psi' decays into gamma pi^0 and gamma eta
• Precison Measurements of the Mass, the Widths of $\psi (3770)$ Resonance and the Cross Section $\sigma [e^{+}{e}^{-}\to \psi (3770)]$ at $E_{\mathrm{cm}}=3.7724$ GeV
• Measurements of the observed cross sections for $e^{+}{e}^{-}\to$ light hadrons at $\sqrt{s}=$ 3.773 and 3.650 GeV
• Update of the measurement of the cross section for e^+e^- -> psi(3770) -> hadrons
• Interaction between scalar field and ideal fluid with inhomogeneous equation of state
• First Observation of the Decays chi_{cJ} -> pi^0 pi^0 pi^0 pi^0
• Measurement of $\mathcal{B}(\psi (3770)\to \gamma {\chi }_{c1})$ and search for $\psi (3770)\to \gamma {\chi }_{c2}$

Cited by in corpus (6)

• Charmonium spectrum and their electromagnetic transitions with higher multipole contributions
• Dispersive analysis of the $\gamma \gamma \to D\bar{D}$ data and the confirmation of the $D\bar{D}$ bound state
• Improved measurements of two-photon widths of the ${\chi }_{cJ}$ states and helicity analysis for ${\chi }_{c2}\to \gamma \gamma$
• Open charm contributions to the E1 transitions of $\psi (3686)$ and $\psi (3770)\to \gamma {\chi }_{cJ}$
• Partial wave effects in the heavy quarkonium radiative electromagnetic decays
• Shedding light on charmonium