propane bubble chamber, produced by the 10 GeV synchrophasotron used to bombard a target forming high energy mesons, was the first to discover the anti-sigma minus hyperon particles on March 9, 1959: The discovery of this new unstable antiparticle which decays in (1.18±0.07)·10−10 s into an antineutron and a negative pion was announced in September of that year: No-one doubted at the time that this particle was elementary, but a few years later, this hyperon, the proton, the neutron, the pion and other hadrons had lost their status of elementary particles as they turned out to be complex particles too consisting of quarks and antiquarks. Directors (1956–1965) Nikolay Bogolyubov (1966–1988) (1989–1991) Vladimir Kadyshevsky (1992–2005) (2005–2010) (May 2010–September 2011) ad interim Victor A. Matveev (2012–2020) Grigory V. Trubnikov (2021 - ) Gallery See also Nuclotron Institute for Nuclear Research Budker Institute of Nuclear Physics, Russian particle physics laboratory in Novosibirsk Institute for High Energy Physics, Russian particle physics laboratory in the vicinity of Moscow; located south of Moscow Institute for Theoretical and Experimental Physics, Russian particle physics laboratory in the vicinity of Moscow; located in Moscow proper Bogolyubov Prize for young scientists, an award for young scientists provided by JINR Notes References External links JINR Website Frank Laboratory of Neutron Physics Website Research institutes established in 1956 Research institutes in Russia Nuclear research institutes Research institutes in the Soviet Union International research institutes Particle physics facilities Nuclear research institutes in Russia Nuclear technology in the Soviet Union Institutes associated with CERN Ivan Zlatev