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Observation of chi(cJ) radiative decays to light vector mesons

Collaboration
•
Jul, 2008
10 pages
Published in:
  • Phys.Rev.Lett. 101 (2008) 151801
e-Print:
DOI:
Report number:
  • CLNS-08-2034,
  • CLEO-08-17
Experiments:
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Abstract: (arXiv)
Using a total of 2.74 x 10^7 decays of the psi(2S) collected with the CLEO-c detector, we present a study of chi_cJ -> gamma V, where V = rho^0, omega, phi. The transitions chi_c1 -> gamma rho^0 and chi_c1 -> gamma omega are observed with B(chi_c1 -> gamma rho^0) = (2.43 +- 0.19 +- 0.22) x 10^-4 and B(chi_c1 -> gamma omega) = (8.3 +- 1.5 +- 1.2) x 10^-5. In the chi_c1 -> gamma rho^0 transition, the final state meson is dominantly longitudinally polarized. Upper limits on the branching fractions of other chi_cJ states to light vector mesons are presented.
  • 14.40.Gx
  • 13.20.Gd
  • electron positron: annihilation
  • psi(3685)
  • radiative decay
  • chi/c1(3510): radiative decay
  • chi/c2(3555): radiative decay
  • vector meson: hadronic decay
  • chi mesons: branching ratio
  • photon: energy spectrum