Measurement of the two photon decay of the χc0(1 3P0) state of charmonium

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Abstract

We report on the decay to two photons of the χc0(1 3P0) charmonium resonance formed in p̄p interactions at Fermilab experiment E835. We have measured the product of branching ratios BR(χc0→p̄p) x BR(χc0→γγ)=(6.52±1.18(stat)-0.72+0.48(sys))×10-8. Using values from the 2002 PDG, this measurement leads to the partial width Γ(χc0→γγ)=2.9±0.9 keV. © 2004 Published by Elsevier B.V.

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Andreotti, M., Bagnasco, S., Baldini, W., Bettoni, D., Borreani, G., Buzzo, A., … Zweber, P. (2004). Measurement of the two photon decay of the χc0(1 3P0) state of charmonium. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 584(1–2), 16–21. https://doi.org/10.1016/j.physletb.2004.01.024

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