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IHEP 2002 - 16 | |
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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.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, E.V.Vlasov, O.P.Yushchenko (Institute for High Energy Physics, Protvino, Russia) V.N.Bolotov, S.V.Laptev, A.R.Pastsjak, A.Yu.Polyarush, A.S.Sadovski, R.Kh.Sirodeev (Institute for Nuclear Research, Moscow, Russia) | ||
| Measurement of the Dalitz Plot Slope Parameters for K- -->pio,pio, pi- Decay Using "ISTRA+" Detector | ||
| Protvino, 2002.- p.10, figs. 10, table 1, refs.:19. | ||
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 214K events with four-momenta measured for the $\pi^-$ and for at least
three involved photons were used for the analysis. The values obtained
g=0.697±0.007(stat)±0.019(syst),
h=0.124±0.007(stat)±0.035(syst),
k=0.006±0.002(stat)±0.004(syst),
are consistent with the world averages dominated by $K^+$ data. Our $g$ value
is by 4 standard deviations different from that obtained by previous $K^-$
experiment.
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