Abstract We report the measurement of the two-photon decay width of χ c2(1P) in two-photon processes at the Belle experiment. We analyze the process γγ → χ c2(1P) → J/ψγ, J/ψ → ℓ + ℓ − (ℓ = e or μ) using a data sample of 971 fb −1 collected with the Belle detector at the KEKB e + e − collider. In this analysis, the product of the two-photon decay width of χ c2(1P) and the branching fraction is determined to be Γ γγ χ c 2 1 P B χ c 2 1 P → J / ψγ B J / ψ → ℓ + ℓ − = 14.8 ± 0.3 stat . ± 0.7 syst . $$ {\Gamma}_{\gamma \gamma}\left({\chi}_{c2}(1P)\right)\mathcal{B}\left({\chi}_{c2}(1P)\to J/\psi \gamma \right)\mathcal{B}\left(J/\psi \to {\ell}^{+}{\ell}^{-}\right)=14.8\pm 0.3\left(\textrm{stat}.\right)\pm 0.7\left(\textrm{syst}.\right) $$ eV, w...
Using 12.7fb of data collected with the CLEO detector at CESR, we observed two-photon production of...
We report the observation of Υ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectr...
International audienceWe report measurements of the branching fractions of singly Cabibbo-suppressed...
AbstractA high precision study of the process γγ→pp¯ has been performed using a data sample of 89 fb...
A high precision study of the process γγ→pp̄ has been performed using a data sample of 89 fb-1 colle...
Two-photon formation of the charmonium resonance χ c2 has been studied with the L3 detector at LEP. ...
The two-photon width Γγγ of the ηc meson has been measured with the L3 detector at LEP. The ηc is st...
Using 980 fb−1 of data at and around the Υ(nS) (n=1, 2, 3, 4, 5) resonances collected with the Bell...
Based on 448.1 × 10 6 ψ ( 3686 ) events collected with the BESIII detector, the decays ψ ( 36...
The two-photon width Γγγ of the ηc meson has been measured with the L3 detector at LEP. The ηc is st...
Using a data sample of 24.5×106 ψ(2S) the reactions ψ(2S)→γχcJ, χcJ→γγ have been studied for the fir...
We report a study of the process γγ→X→η cπ +π -, where X stands for one of the resonances χ c2(1P), ...
Two-photon formation of the charmonium resonance c2 has been studied with the L3 detector at LEP. Th...
We report a study of the process γγ→X→η cπ +π -, where X stands for one of the resonances χ c2(1P), ...
Using 980 fb-1 of data at and around the I (nS) (n=1, 2, 3, 4, 5) resonances collected with the Bell...
Using 12.7fb of data collected with the CLEO detector at CESR, we observed two-photon production of...
We report the observation of Υ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectr...
International audienceWe report measurements of the branching fractions of singly Cabibbo-suppressed...
AbstractA high precision study of the process γγ→pp¯ has been performed using a data sample of 89 fb...
A high precision study of the process γγ→pp̄ has been performed using a data sample of 89 fb-1 colle...
Two-photon formation of the charmonium resonance χ c2 has been studied with the L3 detector at LEP. ...
The two-photon width Γγγ of the ηc meson has been measured with the L3 detector at LEP. The ηc is st...
Using 980 fb−1 of data at and around the Υ(nS) (n=1, 2, 3, 4, 5) resonances collected with the Bell...
Based on 448.1 × 10 6 ψ ( 3686 ) events collected with the BESIII detector, the decays ψ ( 36...
The two-photon width Γγγ of the ηc meson has been measured with the L3 detector at LEP. The ηc is st...
Using a data sample of 24.5×106 ψ(2S) the reactions ψ(2S)→γχcJ, χcJ→γγ have been studied for the fir...
We report a study of the process γγ→X→η cπ +π -, where X stands for one of the resonances χ c2(1P), ...
Two-photon formation of the charmonium resonance c2 has been studied with the L3 detector at LEP. Th...
We report a study of the process γγ→X→η cπ +π -, where X stands for one of the resonances χ c2(1P), ...
Using 980 fb-1 of data at and around the I (nS) (n=1, 2, 3, 4, 5) resonances collected with the Bell...
Using 12.7fb of data collected with the CLEO detector at CESR, we observed two-photon production of...
We report the observation of Υ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectr...
International audienceWe report measurements of the branching fractions of singly Cabibbo-suppressed...