Abstract
An upper limit on the branching ratio for the decay K+→π+νν ̄ is set at 7.5 × 10-9 (90% C.L.) using the kinematic region above the Kπ2 (K+→π+π0) peak. When combined with our result from below the Kπ2 peak, we obtain the limit 5.2 × 10-9. An upper limit of 1.7 × 10-9 is also found on the branching ratio for decays of the form K+→π+X0 where X0 is any massless, weakly interacting neutral particle. Limits are also set for cases where MX0>0.
Original language | English (US) |
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Pages (from-to) | 2521-2524 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 70 |
Issue number | 17 |
DOIs | |
State | Published - 1993 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy