Abstract
We present a measurement of the branching fraction of invisible Υ(1S) decays, using 1.2fb-1 of data collected at the Υ(2S) resonance with the CLEO III detector at CESR. After subtracting expected backgrounds from events that pass selection criteria for invisible Υ(1S) decay in Υ(2S)→π+π-Υ(1S), we deduce a 90% C.L. upper limit of B[Υ(1S)→invisible]<0.39%.
| Original language | English (US) |
|---|---|
| Article number | 031104 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 75 |
| Issue number | 3 |
| DOIs | |
| State | Published - Feb 9 2007 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)
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