Translation. Region: Russian Federal
Source: State University Higher School of Economics – State University Higher School of Economics –
The Russian Academy of Sciences (RAS) has summed up the results of the annual competition for young scientists. Gold medals are awarded to research and inventions that are of great importance for the development of science. One of the winners of the award was Denis Bodrov, a postgraduate student at the International Laboratory of Condensed Matter Physics and a research fellow International Laboratory of Elementary Particle Physics MIEM HSE University. Denis Bodrov told Vyshka.Glavnoe about his work, the competition, and his victory.
About the project
– Our work is devoted to the study of the properties of weak interaction, in particular, responsible for violation of symmetry, which was necessary for the appearance of an excess of matter, which allowed us to appear with you. The most thoroughly the structure of weak interaction has been studied in the decay of Muon. According to the existing generally accepted theory, the standard model (cm), this particle is identical to the electron, but it is harder and decays. Muon and Electron have an even heavier counterpart-Tau-Rlepton. In our work, we conduct a study of its collapse into Muon to obtain new information about the structure of weak interaction. In cm, this structure should be the same in the decays of Muon and Tau-Reton, and our task was to check if this was really so. To do this, we have developed a method that allows you to measure the polarization of the subsidiary of Muon. In specialized installations on the study of the decay of Muon, this was done before us, but the methods used there do not work in accelerating experiments on electron-poster colliders, where information about the polarization of Muon allows you to study other particles that decay on it, such as Tau-Rettleon. According to our estimates, in the already working experiment Belle II and in the experiments of the future it will be possible to achieve a high accuracy comparable to the work received in the work of studying the decay of Muon. In addition, we have applied the developed method for analyzing the data of the already completed Belle experiment and first measured one of the parameters of interest to us, albeit with the still insufficient accuracy, which is associated with the technical restrictions on the experiment of the past.
The target audience of our work is primarily the scientific community, as is usually the case in studies of fundamental issues of the structure of the universe. The goal of all elementary particle physics in recent decades is to search for new physics (NP), which will be beyond the Standard Model. One can search for its obvious manifestation by detecting new particles, or one can accurately measure the parameters of the SM, where any deviation from the predicted values serves as an indication of NP. The second option is the general goal of our work.
About the RAS competition and victory
— A work or a series of works is nominated for participation in this competition; this can be done by members of the Russian Academy of Sciences, scientific organizations, councils, etc. In our case, the work was nominated by the National Research University Higher School of Economics. I believe that the merit of our victory is primarily due to my scientific supervisor Pavel Nikolaevich Pakhlov. I am generally lucky to work under his supervision. Participation in the competition was his initiative.
We submitted a series of works to the competition that took more than five years to complete and included the development of a new method, an assessment of its sensitivity for several present and future experiments, and its implementation on already selected experimental data. This is a very large amount of work, and it was quite difficult to win.
About HSE postgraduate studies
— When I was still a master’s student at MIPT, our research team at HSE opened the International Laboratory of Elementary Particle Physics, so it was logical to go here for graduate school. Fortunately, before that, the Higher School of Economics had opened Faculty of Physics, many of whose teachers also lecture or lectured at the Phystech, so there were no questions about the quality of education. An additional motivation was the “Academic Postgraduate Studies” program. Unfortunately, at the time of my admission, our laboratory did not have its own postgraduate program, and the Physics Department did not have our direction, so I had to go to theoretical physics as the closest direction. Yes, I had to study subjects that were, to put it mildly, distant from the main topic of my research. Nevertheless, many of them turned out to be interesting and expanded my horizons in other areas of physics. In general, my studies in the HSE postgraduate program are going quite smoothly. Now our laboratory already has several HSE postgraduate students, and recently our own postgraduate program was opened, so in the future everything should get even better.
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