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Regular version of the site

Study of heavy hadron decays

2020
Head:

Goal of research:

  • examining the existing models of the strong interactions and comparing the experimental results of the decay amplitudes with the theoretical predictions within the effective theory of the strong interaction and QCD calculations;

  • high precision measurements of the heavy quarks hadrons decays, including charmed baryons semi-leptonic decays and decays of the bottomonia with masses above the open-bottom threshold to the bottomonia with masses below the threshold using the Belle deta, and further using the Belle II data;

  • support of a stable 24/7 functioning of the system for muon identification and long-living kaons reconstruction during the data acquisition on the Belle II experiment;

  • physics analyses of the Belle and Belle II experimental data.

Methodology: statistical methods, BigData, neuronetwork.

Empirical base of research: not applicable

Results of research

As a result of the physical analysis of the accumulated data of the Belle experiment, the upper limits on the branching of rare transitions of bottomonium states with masses above the open bottom threshold to the final states ηb(1S, 2S)ω were set. An original method for measuring the polarization of charmed baryons in their semi-lepton decays is proposed and tested, and a preliminary value of the indicated polarization is obtained. A stable operation of the system for the identification of muons and the reconstruction of long-lived neutral kaons was ensured during the Belle-II experiment, which made it possible to accumulate new data with improved identification and spatial resolution of charged tracks compared to the Belle experiment for further research in the physics of heavy hadrons and leptons.

Publications: