학술논문
Search for light pseudoscalar sgoldstino in K- decays
Document Type
Working Paper
Author
Tchikilev, O.; Ajinenko, I.; Akimenko, S.; Britvich, I.; Britvich, G.; Datsko, K.; Filin, A.; Inyakin, A.; Konstantinov, A.; Konstantinov, V.; Korolkov, I.; Leontiev, V.; Novikov, V.; Obraztsov, V.; Polyakov, V.; Romanovsky, V.; Shelikhov, V.; Smirnov, N.; Uvarov, V.; Yushchenko, O.; Bolotov, V.; Laptev, S.; Pastsjak, A.; Polyarush, A.; Sirodeev, R.
Source
Phys.Lett.B602:149-156,2004
Subject
Language
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.
Comment: 10 pages, LATEX, 8 EPS figures, revised version, to be published in Phys.Lett.B
Comment: 10 pages, LATEX, 8 EPS figures, revised version, to be published in Phys.Lett.B