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Registration Number

0216U010045, 0112U003213 , R & D reports

Title

"Patterns of excitation and decay of heavy hadrons at relativistic energies."

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Head

Pugatch Valery Mykhailovitch,

Registration Date

25-10-2016

Organization

Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine

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In the Department of High Energy Physics (Head of department. Dr.Sci. Filin VM) within the research on "Patterns of excitation and decay of heavy hadrons at relativistic energies." (Stage 2: Analysis experimental data. Measurement of cross sections of the processes of formation of heavy hadrons and their radioactive decay. Modeling of processes involving new heavy particles.) in 2013 yielded the following key results: With the world's highest precision of the analysis of data obtained in proton-proton collisions at energies of 7 and 8 TeV experiment LHCb (Large Hadron Collider, CERN) defined oscillation frequency of B mesons with different quark structure. These frequencies describing physical phenomenon unique mix of particles and anti-particles caused by the difference of their masses, the evolution of matter and antimatter. In particular, in the decay of B mesons with light quarks frequency mixing is ?md = 0.5156 ± 0.0051 ± 0.0033 ps-1, and B-mesons with heavier strange quarks is 34 times greater - ?ms = 17.768 ± 0.023 ± 0.006 ps-1 . For the first time observed the decay of B-mesons, which include Charmey-quark through a four-channel particulate to form charmoniyu positively charged pion and two K-mesons, B + c > J / ?K + K-? +. Experimentally determined the probability of decay of B-mesons through this channel is (0.53 +/- 0.10 +/- 0.05) of the total number of decays of B + c > J / ?? +. This value is important for the development and testing of theoretical models that claim to interpretation and prediction of experimental results with heavy mesons. According to the research within the LHCb collaboration for co-authorship of scientists INR NAS of Ukraine in 2013 published 94 scientific articles. (O.Yu.Ohrimenko, owl VM, VM Yakovenko) To improve the accuracy of the mass of the top quark using the full amount of experimental data D0 (Tevatron, FNAL) (~ 10fb-1) by proton-collision antyprotonnym at 1.96 TeV energy, performed Monte Carlo simulations on the reconstruction of the mass of the top quark dileptonnyh decay channels for transmission of new features and a new zoom jets. (MS Borisov) Dependence cross section of the neutral Higgs boson of renormalization and factorization scales at energies of proton-proton collisions at the Large Hadron Collider (LHC) 7 and 8 TeV. Using the software, based on the models of supersymmetry (SUSY-MSSM), estimated cross section of a neutral Higgs boson fusion gluons considering NNLO corrections to QCD. Calculated spectra masses, decays widths and cross sections birth superchastynok conditions for experiments at the LHC. (TV Obihod) Continues development of elements of Silicon track system for experiment SVM (FAIR, Darmstadt). A prototype system for the cooling of the detector modules mikrostripovymy detectors. Measured transient mizhstripovi and full capacity bilateral silicon sensors and their response to relativistic charged particles in test experiments simulated meet specifications. (AY Lymanets, Y. Sorokin, GN Malygina, YV Panasenko, VA nods, owl VM)5481

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Ілюхіна А.О.
Борисова М.С.
Вербицький А.В.
Жмак Н.А.
Ківа В.О.
Ковальчук О.С.
Костюк І.О.
Лиманець А.О.
Міліція В.М.
Малигіна Г.М.
Обіход Т.В.
Охріменко О.Ю.
Панасенко Я.В.
Петренко Є.О.
Пугач М.В.
Пугач Т.В.
Сорокін Ю.Є.
Сторожик Д.І.
Чаус А.В.
Яковенко В.М.

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2020-04-02