Measurement of $\psip$ Radiative Decays

Abstract

Using 14 million psi(2S) events accumulated at the BESII detector, we report first measurements of branching fractions or upper limits for psi(2S) decays into gamma ppbar, gamma 2(pi^+pi^-), gamma K_s K^-pi^++c.c., gamma K^+ K^- pi^+pi^-, gamma K^{*0} K^- pi^+ +c.c., gamma K^{*0}\bar K^{*0}, gamma pi^+pi^- p pbar, gamma 2(K^+K^-), gamma 3(pi^+pi^-), and gamma 2(pi^+pi^-)K^+K^- with the invariant mass of hadrons below 2.9GeV/c^2. We also report branching fractions of psi(2S) decays into 2(pi^+pi^-) pi^0, omega pi^+pi^-, omega f_2(1270), b_1^\pm pi^\mp, and pi^0 2(pi^+pi^-) K^+K^-.

5 pages, 4 figures

References in corpus (9)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
• BESII Detector Simulation
• Measurements of $\psi (2S)$ decays into Vector- Tensor final states
• Observation of Thirteen New Exclusive Multi-Body Hadronic Decays of the $\psi (2S)$
• Observation of p pbar pi^0 and p pbar eta in psi' decays
• Possible large branching fraction of psi(3770) decays to charmless final states
• Experimental study of $\psi (2S)$ decays to $\K^+ K^- π^+ π^- π^0$ final states

Cited by in corpus (9)

• Spin-Parity Analysis of ppbar Mass Threshold Structure in J/psi and psi' Radiative Decays
• Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements
• Observation of a ppb mass threshoud enhancement in ψ^\prime\toπ^+π^-J/ψ(J/ψ\toγp\bar{p}) decay
• Study of Jψdecaying into ωp \bar p
• Study of $J/\psi \to \omega p\bar{p}$ at BESIII
• From the $\gamma \gamma \to p\bar{p}$ reaction to the production of $p\bar{p}$ pairs in ultraperipheral ultrarelativistic heavy-ion collisions at the LHC
• Near threshold ppbar enhancement in the J/psi -> omega ppbar decay
• Recent BES Results on Hadron Spectroscopy
• Observation of Charmonium $h_c$ Radiative Decays to Multiple Light Hadrons and the Tensor State $f_2(1270)$