Study of the γγ decays of the χc2(13P2) and χc0(13P0) charmonium resonances

M. Ambrogiani*, S. Argirò, S. Bagnasco, W. Baldini, D. Bettoni, G. Borreani, A. Buzzo, R. Calabrese, A. Ceccucci, R. Cester, P. Dalpiaz, X. Fan, G. Garzoglio, K. E. Gollwitzer, A. Hahn, S. Jin, J. Kasper, G. Lasio, M. Lo Vetere, E. LuppiP. Maas, M. Macrì, M. Mandelkern, F. Marchetto, M. Marinelli, W. Marsh, M. Martini, E. Menichetti, R. Mussa, M. M. Obertino, M. Pallavicini, N. Pastrone, C. Patrignani, T. K. Pedlar, J. Peoples, S. Pordes, E. Robutti, B. Roccuzzo, J. Rosen, P. Rumerio, A. Santroni, M. Savriè, J. Schultz, K. K. Seth, G. Stancari, M. Stancari, J. Streets, A. Tomaradze, S. Werkema, G. Zioulas

*Corresponding author for this work

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37 Scopus citations

Abstract

We report the branching ratios of the χc2(13P2) and χc0(13P0) charmonium resonances to two photons using event samples collected by Fermilab experiment E835 in the reactions p̄p→χc2(13P2)[χ c0(13P0)]. Our result for the χc2 is B(χ c2→γγ)=(1.35±0.25±0.12)×10 -4. We set a 95% upper limit for the χc0 branching ratio B(χc0→γγ) at 2.09×10-4.

Original languageEnglish (US)
Article number052002
Pages (from-to)1-11
Number of pages11
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume62
Issue number5
StatePublished - Sep 1 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Ambrogiani, M., Argirò, S., Bagnasco, S., Baldini, W., Bettoni, D., Borreani, G., Buzzo, A., Calabrese, R., Ceccucci, A., Cester, R., Dalpiaz, P., Fan, X., Garzoglio, G., Gollwitzer, K. E., Hahn, A., Jin, S., Kasper, J., Lasio, G., Lo Vetere, M., ... Zioulas, G. (2000). Study of the γγ decays of the χc2(13P2) and χc0(13P0) charmonium resonances. Physical Review D - Particles, Fields, Gravitation and Cosmology, 62(5), 1-11. [052002].