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Information × Registration Number 0220U100937, 0119U100310 , R & D reports Title Search of charged Higgs bosons in ultra-precise measurements at the B-factory of the new generation SuperKEKB. popup.stage_title Head Aushev Volodymyr Yegorovich, Доктор фізико-математичних наук Registration Date 29-01-2020 Organization Taras Shevchenko National University of Kyiv popup.description2 Object of study: Rare semi-leptonic modes of decay of B mesons in electron-positron collisions on the SuperKEKB collider, in which the influence of charged Higgs bosons on the ratio R (D *) and R (D) characterizing the sensitivity of weak processes to mass is hidden charged leptons. The importance of such studies is clear from the fact that according to SM the decay of B-mesons with the formation of electrons and muons occurs with the dominance of stem processes involving the exchange W ± bosons. In such processes, the manifestation of New Physics is greatly suppressed. But processes involving the most difficult-to-nature 3rd generation lepton are sensitive to contributions from other exchange particles outside the SM. Purpose: The purpose of this work is to find evidence of the effect of charged Higgs bosons in semi-lepton tauonic decays. Measurement of decay ratios R (D *) = Br (B ​​→ D * τ ν) / Br (B ​​→ D * lν) with high accuracy. Research Methods: Monte Carlo simulation of event generation in SuperKEKB collider detection systems, comparison with experimental data. Participation in the development and calibration of the front and barrel of the KLM calorimeter Belle II detector was carried out. Monte Carlo simulations of the physical processes that will be studied on the SuperKEKB electron positron collider have been carried out. The background constituents for the lepton and half-lepton modes of decay in mesons are investigated. Reconstruction of modes of decay of D mesons: DS + → π +, DS + → K0 S K +, DS + → K * 0 π +, D * + → D0 π +, D * + → D + π0, D0 → K- π + , D0 → K- 2π + π-, D0 → K- π + π0, D0 → K0 S π + π0, D * + S → DS + γ, D ** → D * → D.  Product Description popup.authors Aushev Volodymyr Ye. Gogota Olga Petrivna Gorbachenko Olexandr M. Dudar Bogdan V. Kadenko Artem O. Kalyuzschnyj Vladyslav V. Minchenko Dmytro I. Meleshko Dmytro Yu. Onischuk Yuriy M. Pidgurskiy Ivan I. Solodovnyk Kateryna M. Tysak Taisiya A. Shyrma Yuriy O. Schedrolos'ev Mykyta D. popup.nrat_date 2020-04-02 Close