arXiv:hep-ex/0205027·v2·High Energy Physics — Experiment
Measurement of the Dalitz plot slope parameters for K- -> pi0 pi0 pi- decay using ISTRA+ detector
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🇷🇺
Abstract
The Dalitz plot slope parameters g, h and k for the K- -> pi0 pi0 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 252 K events with four-momenta measured for the pi- and four involved photons were used for the analysis. The values obtained g=0.627+/-0.004(stat)+/-0.010(syst), h=0.046+/-0.004(stat)+/-0.012(syst), k=0.001+/-0.001(stat)+/-0.002(syst) are consistent with the world averages dominated by K+ data, but have significantly smaller errors.
Comments: LaTeX, 10 pages, 8 eps-figures, update of IHEP 2002-16