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arXiv · hep-ex/0308061

Search for light pseudoscalar sgoldstino in K- decays

O. Tchikilev·I. Ajinenko·S. Akimenko·I. Britvich·G. Britvich·K. Datsko·A. Filin·A. Inyakin·A. Konstantinov·V. Konstantinov·I. Korolkov·V. Leontiev·V. Novikov·V. Obraztsov·V. Polyakov·V. Romanovsky·V. Shelikhov·N. Smirnov·V. Uvarov·O. Yushchenko·V. Bolotov·S. Laptev·A. Pastsjak·A. Polyarush·R. Sirodeev
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Abstract

A search for the light pseudoscalar sgoldstino production in the three body K- decay K-->pipi0P has been performed with the ISTRA+ detector exposed to the 25 GeV negative secondary beam of the U70 proton synchrotron. No signal is seen. An upper limit for the branching ratio Br(K->pipi0P), at 90% confidence level, is found to be around 9*10**-6 in the effective mass m(P) range from 0 till 200 MeV, excluding the region near m(pi0) where it degrades to 3.5*10**-5.

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O. Tchikilev, I. Ajinenko, S. Akimenko, I. Britvich, G. Britvich, K. Datsko, A. Filin, A. Inyakin, A. Konstantinov, V. Konstantinov, I. Korolkov, V. Leontiev, V. Novikov, V. Obraztsov, V. Polyakov, V. Romanovsky, V. Shelikhov, N. Smirnov, V. Uvarov, O. Yushchenko, V. Bolotov, S. Laptev, A. Pastsjak, A. Polyarush, R. Sirodeev. 2004-10-11. Search for light pseudoscalar sgoldstino in K- decays. https://doi.org/10.1016/j.physletb.2004.10.002

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