With participation of MLIT, first observation of Bc∗+ meson took place in ATLAS at LHC The ATLAS collaboration at the Large Hadron Collider (CERN) ) announced the discovery of a new excited state, the Bc∗+B_{c}^{*+} vector meson. Experimental data analysis was conducted with the decisive contribution of physicists from the Dzhelepov Laboratory of Nuclear Problems and the Meshcheryakov Laboratory of Information Technologies. Sketch of final state particles produced by the decay chain used in the ATLAS analysis © ATLAS Collaboration, CERN At the Large Hadron Collider Physics 2026 conference, researchers from the ATLAS collaboration reported the first observation of a particle with properties consistent with the Bc∗+B_{c}^{*+}meson, the lowest excited Bc+B_{c}^{*+} meson. Specialists from the MLIT EventIndex group, senior researcher Evgeny Alexandrov and researcher Alexander Yakovlev, under the supervision of Head of the MLIT Distributed Real-Time Systems Sector Igor Alexandrov, participated in experimental data analysis that resulted in the first observation of the new particle. Leading researcher of the Scientific and Experimental Department of Colliding Beams Leonid Gladilin and researcher of the same Department Tatiana Lyubushkina took part in this work on behalf of DLNP. The results of the research were published on the electronic preprint archive website: arXiv:2605.16228. The discovery provides valuable new input for theoretical models describing heavy-hadron mass spectra and helps to improve the understanding of the strong interaction, the fundamental force that binds quarks together and keeps atomic nuclei from decaying. A system of two heavy quarks of different flavors represents an ideal natural laboratory for testing theoretical computations of quantum chromodynamics with unprecedented precision. Read more on the JINR website...
