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IHEP 2003 - 16 | |
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| I.V.Ajinenko, S.A.Akimenko, G.I.Britvich, K.V.Datsko, A.P.Filin, A.V.Inyakin, A.S.Konstantinov, V.F.Konstantinov, I.Y.Korolkov, 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) | ||
| Updated measurement of the Dalitz plot slope parameters for $K^- \rightarrow \pi^0\, \pi^0\, \pi^-$ decay using ISTRA+ detector | ||
| Protvino, 2003.- p.9, figs. 8, table 1, refs.:21. | ||
The Dalitz plot slope parameters g, h and k for the
$K^- \rightarrow \pi^0\, \pi^0\, \pi^-$
decay have been measured using in-flight decays detected with the "ISTRA+"
setup operating in the 25 GeV negative secondary beam of the U-70 PS.
About 252K events with four-momenta measured for the pi- and
four involved photons were used for the analysis. The values obtained
$g=0.627\pm0.004(stat)\pm0.010(syst)$,
$h=0.046\pm0.004(stat)\pm0.012(syst)$,
$k=0.001\pm0.001(stat)\pm0.002(syst)$,
are consistent with the world averages dominated by K+ data, but have
significantly smaller errors.
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