Observation of a near-threshold enhancement in the omega phi mass spectrum from the doubly OZI suppressed decay J / psi --> gamma omega phi - INSPIRE

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Observation of a near-threshold enhancement in the omega phi mass spectrum from the doubly OZI suppressed decay J / psi --> gamma omega phi

BES

Collaboration

Feb, 2006

5 pages

Published in:

Phys.Rev.Lett. 96 (2006) 162002

e-Print:

hep-ex/0602031 [hep-ex]

DOI:

10.1103/PhysRevLett.96.162002

PDG:

{{\mathit J / \psi}{(1S)}}

\rightarrow

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

\rightarrow

{{\mathit \gamma}}{{\mathit \omega}}{{\mathit \phi}}

Experiments:

BEPC-BES

View in:

ADS Abstract Service

reference search123 citations

Citations per year

Abstract: (arXiv)

An enhancement near threshold is observed in the \omega \phi invariant mass spectrum from the doubly OZI suppressed decays of J/\psi \to \gamma \omega \phi, based on a sample of 5.8 X 10^7 J/\psi events collected with the BESII detector. A partial wave analysis shows that this enhancement favors J^P = 0^+, and its mass and width are M = 1812^{+19}_{-26} (stat) +- 18 (syst) MeV/c^2 and \Gamma = 105+-20 (stat) +- 28

(syst) MeV/c^2. The product branching fraction is determined to be B(J/\psi\to \gamma X) B(X\to\omega\phi) = (2.61 +- 0.27 (stat) +- 0.65

(syst)) X 10^{-4}.

Note:

Accepted by PRL, the version to be appeared in PRL

13.20.Gd
14.40.Cs
13.30.Ce
12.39.Mk
electromagnetic decays
psi mesons
meson hadronic decay
quantum chromodynamics
electron positron: colliding beams
electron positron: annihilation

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Figures(7)

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