We report the branching ratios of the chi(c2)(1(3)P(2)) and chi(c0)(1(3)P(0)) charmonium resonances to two photons using event samples collected by Fermilab experiment E835 in the reactions (p) over bar p --> chi(c2)(1(3)P(2))[chi(c0)(1(3)P(0))] Our result for the chi(c2) is B(chi(c2) --> gamma gamma) = (1.35 +/- 0.25 +/- 0.12) X 10(-4). We set a 95% upper limit for the chi(c0) branching ratio B(chi(c0) --> gamma gamma) at 2.09 X 10(-4).
Study of the gamma gamma decays of the chi(c2)(1(3)P(2)) and chi(c omicron)(1(3)P(omicron)) charmonium resonances
ARGIRO', Stefano;MENICHETTI, Ezio;OBERTINO, Maria Margherita;
2000-01-01
Abstract
We report the branching ratios of the chi(c2)(1(3)P(2)) and chi(c0)(1(3)P(0)) charmonium resonances to two photons using event samples collected by Fermilab experiment E835 in the reactions (p) over bar p --> chi(c2)(1(3)P(2))[chi(c0)(1(3)P(0))] Our result for the chi(c2) is B(chi(c2) --> gamma gamma) = (1.35 +/- 0.25 +/- 0.12) X 10(-4). We set a 95% upper limit for the chi(c0) branching ratio B(chi(c0) --> gamma gamma) at 2.09 X 10(-4).
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