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 |
---|---|
Article number | 031104 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 75 |
Issue number | 3 |
DOIs | |
Publication status | Published - 9 Feb 2007 |
Externally published | Yes |
Bibliographical note
Copyright:Copyright 2007 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)