Search for invisible decays of $\omega$ and $\phi$ with $J/\psi$ data at BESIII - INSPIRE

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Search for invisible decays of $\omega$ and $\phi$ with $J/\psi$ data at BESIII

BESIII

Collaboration

May 15, 2018

10 pages

Published in:

Phys.Rev.D 98 (2018) 3, 032001

Published: Aug 4, 2018

e-Print:

1805.05613 [hep-ex]

DOI:

10.1103/PhysRevD.98.032001

PDG:

{{\mathit \omega}{(782)}}

\rightarrow

{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}

Report number:

BAM-0303

Experiments:

BEPC-BES-III

View in:

ADS Abstract Service

reference search25 citations

Citations per year

Abstract: (APS)

Using a data sample of (1310.6±7.0)×106 J/ψ events collected with the BESIII detector operating at the BEPCII collider, we perform the first experimental search for invisible decays of a light vector meson (V=ω, ϕ) via J/ψ→Vη decays. The decay of η→π+π-π0 is utilized to tag the V meson decaying into the invisible final state. No evidence for a significant invisible signal is observed, and the upper limits on the ratio of branching fractions at the 90% confidence level are determined to be B(ω→invisible)B(ω→π+π-π0)<8.1×10-5 and B(ϕ→invisible)B(ϕ→K+K-)<3.4×10-4. By using the world average values of B(ω→π+π-π0) and B(ϕ→K+K-), the upper limits on the decay branching fractions at the 90% confidence level are set as B(ω→invisible)<7.3×10-5 and B(ϕ→invisible)<1.7×10-4, respectively.

Note:

10 pages, 6 figures

Particle Physics Experiments
electron positron: annihilation
electron positron: colliding beams
J/psi(3100): electroproduction
omega(783): branching ratio
Phi(1020): branching ratio
branching ratio: ratio
branching ratio: upper limit
omega(783): invisible decay
Phi(1020): invisible decay

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Figures(9)

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