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

M. Andreotti*, S. Bagnasco, W. Baldini, D. Bettoni, G. Borreani, A. Buzzo, R. Calabrese, R. Cester, G. Cibinetto, P. Dalpiaz, G. Garzoglio, K. E. Gollwitzer, M. Graham, M. Hu, D. Joffe, J. Kasper, G. Lasio, M. Lo Vetere, E. Luppi, M. MacrìM. Mandelkern, F. Marchetto, M. Marinelli, E. Menichetti, Z. Metreveli, R. Mussa, M. Negrini, M. M. Obertino, M. Pallavicini, N. Pastrone, C. Patrignani, T. K. Pedlar, S. Pordes, E. Robutti, W. Roethel, J. L. Rosen, P. Rumerio, R. Rusack, A. Santroni, J. Schultz, S. H. Seo, K. K. Seth, G. Stancari, M. Stancari, A. Tomaradze, I. Uman, T. Vidnovic, S. Werkema, P. Zweber

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)16-21
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - Mar 25 2004

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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