Pseudoscalar production at omega omega threshold in J/psi ---> gamma omega omega - INSPIRE

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Pseudoscalar production at omega omega threshold in J/psi ---> gamma omega omega

BES

Collaboration

Apr, 2006

18 pages

Published in:

Phys.Rev.D 73 (2006) 112007

e-Print:

hep-ex/0604045 [hep-ex]

DOI:

10.1103/PhysRevD.73.112007

PDG:

{{\mathit f}_{{{0}}}{(1710)}}

\rightarrow

{{\mathit \omega}}{{\mathit \omega}}

Experiments:

BEPC-BES

View in:

ADS Abstract Service

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Abstract: (arXiv)

The decay channel J/\psi->gamma omega omega, omega -> pi+ pi- pi0 is analyzed using a sample of 5.8x10^7 J/psi events collected with the BESII detector. The omega omega invariant mass distribution peaks at 1.76 GeV/c^2, just above the omega omega threshold. Analysis of angular correlations indicate that the omega omega system below 2 GeV/c^2 is predominantly pseudoscalar. A partial wave analysis confirms the predominant pseudoscalar structure, together with small 0^{++} and 2^{++} contributions, and yields a pseudoscalar mass M = 1744 \pm 10 (stat) \pm 15 (syst) MeV/c^2, a width Gamma = 244^{+24}_{-21} (stat) \pm 25 (syst) MeV/c^2, and a product branching fraction Br(J/psi-> gamma eta(1760)) \cdot Br(\eta(1760)->omega omega) = (1.98 \pm 0.08 (stat) \pm 0.32 (syst)) x 10^{-3}.

Note:

18 pages, 5 figures, submit to PRD

12.39.Mk
13.30.Ce
13.20.Gd
14.40.Cs
electron positron: colliding beams
electron positron: annihilation
J/psi(3100): electroproduction
J/psi(3100): radiative decay
omega(783): pair production
omega(783): hadronic decay

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