New measurements of the resonance parameters of the χc0(13P0) state of charmonium

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The resonance parameters of the χc0, the 13P0 state of charmonium, have been measured at the Fermilab Antiproton Accumulator in the reaction pp → χc0 → γJ/ψ → γ(e+e-). A large data sample collected during the year 2000 run yields the results: M(χc0) = 3415.4±0.4±0.2 MeV/c2, γ(χc0) = 9.8±1.0±0.1 MeV, B(χc0 → pp) × B(χc0 → γJ/ψ) × B(J/ψ → (e+e-)) = (1.61±0.11±0.08) × 10-7. Taking B(χc0 → γJ/ψ) and B(J/ψ → e+e-) from the literature, we obtain B(χc0 → pp) = (4.1±0.3-0.9+16) × 10-4 and γ(χc0 → pp) = (4.0±0.4-0.9+1.6) keV.

Original languageEnglish (US)
Pages (from-to)237-242
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume533
Issue number3-4
DOIs
StatePublished - May 9 2002

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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