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IHEP 2003 - 20 | |
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| I.V.Ajinenko, S.A.Akimenko, G.I.Britvich, I.G.Britvich, K.V.Datsko, A.P.Filin, A.V.Inyakin, A.S.Konstantinov, V.F.Konstantinov, I.Y.Korolkov, V.A.Khmelnikov, V.M.Leontiev, V.P.Novikov, V.F.Obraztsov, V.A.Polyakov, V.I.Romanovsky, V.I.Shelikhov, N.E.Smirnov, O.G.Tchikilev, V.A.Uvarov, O.P.Yushchenko (Institute for High Energy Physics, Protvino, Russia), V.N.Bolotov, S.V.Laptev, A.R.Pastsjak, A.Yu.Polyarush, R.Kh.Sirodeev (Institute for Nuclear Research, Moscow, Russia) | ||
| Search for light pseudoscalar sgoldstino in $K^{-} $-decays | ||
| Protvino, 2003.- p.8, figs. 8, table 1, refs.:8. | ||
A search for the light pseudoscalar sgoldstino production in three-body $K^{-}$ decay $K^{-} \rightarrow \pi^{-}\pi^{0}~ P $ has been performed with the ``ISTRA+'' detector exposed to the 25 GeV negative secondary beam of the U-70 proton synchrotron. No signal is seen. Upper limit for the branching ratio $Br (K^{-} \rightarrow \pi^{-} \pi^{0} P)$ at $90 \%$ confidence level is found to be $\sim 8~ \cdot ~10^{-6}$ in the effective mass $m_{P}$ range $0 \div 200$~MeV, excluding the region near $m_{\pi^{\circ}}$ where it degrades to $\sim 3~ \cdot ~10^{-5}$.
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