| Główna > Search for light pseudoscalar sgoldstino in $K^{-}$ decays |
| Article | |
| Title | Search for light pseudoscalar sgoldstino in $K^{-}$ decays |
| Author(s) | Chikilev, O G ; Akimenko, S A ; Bolotov, V N ; Britvich, G I ; Datsko, K V ; Filin, A P ; Inyakin, A V ; Khmelnikov, V A ; Konstantinov, A S ; Konstantinov, V F ; Korolkov, I Ya ; Laptev, S V ; Leontiev, V M ; Novikov, V P ; Obraztsov, V F ; Pastsjak, A R ; Polyakov, V A ; Polyarush, A Yu ; Romanovsky, V I ; Shelikhov, V I ; Smirnov, N E ; Uvarov, V A ; Yushchenko, O P |
| Affiliation | (Inst of High Energy Phys, Protvino, Russia) |
| Publication | 2004 |
| In: | Phys. Lett. B 602 (2004) 149-56 |
| Subject category | Particle Physics - Experiment |
| Abstract | A search for the light pseudoscalar sgoldstino production in the three-body K/sup -/ decay K/sup -/ to pi /sup -/ pi /sup 0/P has been performed with the "ISTRA+" detector exposed to the 25 GeV/c negative secondary beam of the U-70 proton synchrotron. No signal is observed. An upper limit for the branching ratio Br(K/sup -/ to pi /sup -/ pi /sup 0/P), at 90% confidence level, is determined to be 9*10/sup -6/ in the effective mass m/sub P/ range from 0 to 200 MeV/c/sup 2/, excluding the region near m/sub pi //sup 0/ where it degrades to 3.5*10/sup -5/. |