New results on the rare, doubly radiative decay η→π0γγ have been obtained from a revised analysis of the Crystal Ball experiment performed at the AGS. The analysis yields the first information on the dependence of the decay width, Γ(η→π0γγ), on the two-photon invariant mass squared, m2(γγ). A re-evaluation of the branching ratio is also made, BR(η→π0γγ)=(2.21±0.24stat±0.47syst)×10−4; it implies that the decay width is Γ(η→π0γγ)=0.285±0.031stat±0.061syst eV. These results are close to predictions based on chiral perturbation theory with vector-meson dominance.</p
Using 12.7fb of data collected with the CLEO detector at CESR, we observed two-photon production of...
Based on 448.1×106 ψ(3686) events collected with the BESIII detector, the decays ψ(3686)→γχcJ,χcJ→γγ...
Using the inclusive photon spectrum based on a data sample collected at the J/ψ peak with the KEDR d...
A new measurement of the rare, doubly radiative decay η→π0γγ was conducted with the Crystal Ball and...
AbstractWe report on the decay to two photons of the χc0(13P0) charmonium resonance formed in p̄p in...
Using a data sample of 24.5×106 ψ(2S) the reactions ψ(2S)→γχcJ, χcJ→γγ have been studied for the fir...
The dynamics of the η→3π0 decay have been studied with the Crystal Ball multiphoton spectrometer and...
Using 203 pb-1 of data collected by the Mark II detector at the SLAC storage ring PEP, we have measu...
The photon spectrum in B→Xs γ decay, where X s is any strange hadronic state, is studied using a dat...
We report the observation of Υ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectr...
Abstract We report the measurement of the two-photon decay width of χ c2(1P) in two-photon processes...
We present new measurements of photon energies and branching fractions for the radiative transitions...
We study the process \u3b3\u3b3\u2192J/\u3c8\u3c9 using a data sample of 519.2\u2009\u2009fb-1 recor...
The two-photon width Γγγ of the ηc meson has been measured with the L3 detector at LEP. The ηc is st...
The photon spectrum in B\u2192Xs \u3b3 decay, where X s is any strange hadronic state, is studied us...
Using 12.7fb of data collected with the CLEO detector at CESR, we observed two-photon production of...
Based on 448.1×106 ψ(3686) events collected with the BESIII detector, the decays ψ(3686)→γχcJ,χcJ→γγ...
Using the inclusive photon spectrum based on a data sample collected at the J/ψ peak with the KEDR d...
A new measurement of the rare, doubly radiative decay η→π0γγ was conducted with the Crystal Ball and...
AbstractWe report on the decay to two photons of the χc0(13P0) charmonium resonance formed in p̄p in...
Using a data sample of 24.5×106 ψ(2S) the reactions ψ(2S)→γχcJ, χcJ→γγ have been studied for the fir...
The dynamics of the η→3π0 decay have been studied with the Crystal Ball multiphoton spectrometer and...
Using 203 pb-1 of data collected by the Mark II detector at the SLAC storage ring PEP, we have measu...
The photon spectrum in B→Xs γ decay, where X s is any strange hadronic state, is studied using a dat...
We report the observation of Υ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectr...
Abstract We report the measurement of the two-photon decay width of χ c2(1P) in two-photon processes...
We present new measurements of photon energies and branching fractions for the radiative transitions...
We study the process \u3b3\u3b3\u2192J/\u3c8\u3c9 using a data sample of 519.2\u2009\u2009fb-1 recor...
The two-photon width Γγγ of the ηc meson has been measured with the L3 detector at LEP. The ηc is st...
The photon spectrum in B\u2192Xs \u3b3 decay, where X s is any strange hadronic state, is studied us...
Using 12.7fb of data collected with the CLEO detector at CESR, we observed two-photon production of...
Based on 448.1×106 ψ(3686) events collected with the BESIII detector, the decays ψ(3686)→γχcJ,χcJ→γγ...
Using the inclusive photon spectrum based on a data sample collected at the J/ψ peak with the KEDR d...