literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Study of χcJ\chi_{cJ} radiative decays into a vector meson

Collaboration
•
Mar, 2011
8 pages
Published in:
  • Phys.Rev.D 83 (2011) 112005
e-Print:
DOI:
Experiments:
View in:
pdf
reference search162 citations

Citations per year

2011201520192023202505101520
Abstract: (arXiv)
The decays χcJ→γV\chi_{cJ}\to\gamma V (V=ϕ,ρ0,ωV=\phi, \rho^0, \omega) are studied with a sample of radiative \psip\to\gamma\chi_{cJ} events in a sample of (1.06\pm0.04)\times 10^{8} \psip events collected with the BESIII detector. The branching fractions are determined to be: B(χc1→γϕ)=(25.8±5.2±2.3)×10−6{\cal B}(\chi_{c1}\to \gamma\phi)=(25.8\pm 5.2\pm 2.3)\times 10^{-6}, B(χc1→γρ0)=(228±13±22)×10−6{\cal B}(\chi_{c1}\to \gamma\rho^0)=(228\pm 13\pm 22)\times 10^{-6}, and B(χc1→γω)=(69.7±7.2±6.6)×10−6{\cal B}(\chi_{c1}\to \gamma\omega)=(69.7\pm 7.2\pm 6.6)\times 10^{-6}. The decay χc1→γϕ\chi_{c1}\to \gamma\phi is observed for the first time. Upper limits at the 90% confidence level on the branching fractions for χc0\chi_{c0} and \chict decays into these final states are determined. In addition, the fractions of the transverse polarization component of the vector meson in χc1→γV\chi_{c1}\to \gamma V decays are measured to be 0.29−0.12−0.09+0.13+0.100.29_{-0.12-0.09}^{+0.13+0.10} for χc1→γϕ\chi_{c1}\to \gamma\phi, 0.158±0.034−0.014+0.0150.158\pm 0.034^{+0.015}_{-0.014} for χc1→γρ0\chi_{c1}\to \gamma\rho^0, and 0.247−0.087−0.026+0.090+0.0440.247_{-0.087-0.026}^{+0.090+0.044} for χc1→γω\chi_{c1}\to \gamma\omega, respectively. The first errors are statistical and the second ones are systematic.
Note:
  • 8 pages, 3 figures
  • 13.20.Gd
  • 14.40.Lb
  • electron positron: annihilation
  • psi(3685): radiative decay
  • chi mesons: radiative decay
  • vector meson: final state
  • rho(770)0
  • omega(783)
  • Phi(1020)
  • chi/c1(3510): branching ratio: measured