It was demonstrated recently that the $W_{1+\infty}$ algebra contains commutative subalgebras associated with all integer slope rays (including the vertical one). In our work, we realize that every element of such a ray is associated with a $\widetilde W$ algebra. In particular, the simplest commutative subalgebra associated with the rational Calogero Hamiltonians is associated with the...
Cosmic rays with energies above $10^{19}$eV, observed in 1999 - 2004 by the High Resolution Fly's Eye (HiRes) experiment in the stereoscopic mode, were found to correlate with directions to distant BL Lac type objects (BL Lacs), suggesting non-standard neutral particles travelling for cosmological distances without attenuation. This effect could not be tested by newer experiments because of...
The SuperFGD detector, a 3D segmented neutrino detector for accelerator neutrinos, is a significant part of the T2K (Japan) long-base experiment. The design size is 192 × 56 × 184 cm3 along the axes x-y-z respectively. The main components are 56000 channels and 2 million scintillation cubes. The scintillator composition is polystyrene doped with 1.5% of paraterphenyl (PTP) and 0.01% of POPOP....
In this poster,is shown how the current models of reactor antineutrino energy spectra impact the estimates of the count rate for coherent elastic neutrino-nucleus scattering ($CE\nu NS$) in the RED-100 experiment. We have analyzed the spectra-averaged differential cross-section $\frac{d\sigma}{dT}$, where T represents the energy of a xenon nuclear recoil, for each model and compared the...
The NuGeN experiment is aimed to investigate antineutrino properties at the Kalinin Nuclear Power Plant using a P-type point contact high purity germanium detector. The experimental setup deployed at about 11 meters from the reactor core benefits from the combination of active and passive shielding. This talk presents the sensitivity of the experiment to antineutrino magnetic moment derived...
This work is devoted to the study of the scaling function $\Phi(\eta)$, associated with the free energy of the Ising model in the region $T \rightarrow T_{c}$, $H \rightarrow 0$, using numerical data obtained by the truncated free fermion space approach method (TFFSA method). Using this method, an estimate of some parameters of this function is provided, including the position of the Yang-Lee...
Keywords: Muon Flux, Local Muon Density Spectrum, High Energies, Extensive Air Showers, Multi-Wire Drift Chambers.
In this talk the concept of the Multifunctional Detector of Muons (MDM) which is currently developed in the National Research Nuclear University MEPhI is described. MDM represents an array of multi-wire drift chambers shielded by absorber layers, designed to investigate single...
We develop Schwinger-Keldysh in-in formalism for generic nonequilibrium dynamical systems with mixed initial states. We construct the generating functional of in-in Green's functions and expectation values for a generic density matrix of the Gaussian type and show that the requirement of particle interpretation selects a distinguished set of positive/negative frequency basis functions of the...
One of the fundamental goals of particle physics is to gain microscopic understanding of the strong interaction. Electromagnetic form factors quantify the structure of hadrons in terms of charge and magnetization distributions. While the nucleon structure has been investigated extensively, data on hyperons is still scarce. It has recently been demonstrated that electron-positron annihilations...
The two-dimensional CP(N-1) sigma model we consider is an effective theory on the world-sheet of a non-Abelian string with a special mass deformation parameter. As the model is a non-supersymmetric, it may contain, the study of which is one of the purposes of this work.
CP(N-1) model is asymptotically free [1], dynamic scale in this Λ arises from the dimensional transmutation, similar to QCD....
The goal of the current work is an upgrade of the heavy neutrinos search with T2K near detector ND280. The poster represents current status of the aforementioned upgrade and main results of the previous analysis.
First reason for the upgrade is availability of the new statistics since year 2018. Secondly, in previous analysis charged pions decays to heavy neutrinos were not taken into...
We report our results on the new technique for searching for photon-induced EAS events at the Carpet-3 experiment. To search for photon-like events, we employ a neural network, trained on Monte-Carlo simulations of the experiment. Both reconstructed EAS parameters and raw detector signal data are being used. On Monte-Carlo simulations our method achieves considerably higher background...
The opaque scintillator detector is a novel concept for a new generation of position-sensitive detectors. The main idea is to localize the light near the point of its scintillation via the scattering medium. The first and only published results were presented by the LiquidO collaboration, so further investigation is required.
Our approach suggests the usage of granular organic scintillator as...
The report includes the results of $B_c^+ \rightarrow \psi(2S)~\pi^+$ and $B_c^+ \rightarrow J/\psi~\pi^+$ decays study. The analysis is performed using RunII $pp$ collision data collected by CMS in 2016$-$2018 at center-of-mass energy $\sqrt{s} = 13~TeV$. The data corresponds to an integrated luminosity of 140 fb$^{-1}$.
This analysis provides research of semileptonic decays of $B_s$ mesons on Belle experiment. The analysis makes use of hadronic tagging and is performed on 121.4 $\text{fb}^{−1}$ of data collected at $\Upsilon(5S)$ resonance state at the KEKB asymmetric energy $e^+ e^−$ collider located at the High
Energy Accelerator Research Organisation, Japan. The goal is to optimize the recovery of the lost...
To date, many experiments in the field of reactor antineutrinos show a discrepancy between the predicted antineutrino spectrum and the measured one. Therefore, the problem of reconstruction of the antineutrino spectrum seems so actual. It is possible to compare the measured and predicted spectra of positrons and not solve the inverse problem which requires a complicated unfolding procedure. ...
Currently the Standard Model (SM) is considered as a low-energy approximation of the future fundamental theory describing all interactions. The SM is agreement with almost all experimental data, but also has obvious disadvantages, which are the reason for further, deeper verification of the SM and search for new physics. The deviation from the SM predictions can be interpreted by the emergence...
