Search for invisible decay of the Upsilon(1S)

We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)->pi+pi-Upsilon(1S) transition using a data sample of 2.9 fb^{-1} at the Upsilon(3S) resonance. The data were collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No signal is found, and an upper limit for the branching fraction at the 90% confidence level is determined to be B(Upsilon(1S)->invisible) < 2.5x10^{-3}.

13.25.Gv
electron positron: colliding beams
electron positron: annihilation
Upsilon(10355): electroproduction
Upsilon(10355): hadronic decay
Upsilon(9460): rare decay
dark matter
mass spectrum: (pi- pi+)
mass spectrum: recoil
Upsilon(9460): branching ratio

References(0)

Figures(0)

Loading ...