S. V. Grishin
A5089922046- Magneto-Optical Properties and Applications
- Nonlinear Dynamics and Pattern Formation
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Magnetic properties of thin films
- Nonlinear Photonic Systems
- Advanced Fiber Laser Technologies
- Chaos control and synchronization
- Photonic Crystals and Applications
- Synthesis and properties of polymers
- Gyrotron and Vacuum Electronics Research
- Magnetic Properties and Applications
- Nonlinear Waves and Solitons
- Multiferroics and related materials
- Quantum optics and atomic interactions
- Liquid Crystal Research Advancements
- Advanced Research in Systems and Signal Processing
- Photonic and Optical Devices
- Metamaterials and Metasurfaces Applications
- Chemical Synthesis and Reactions
- Particle Accelerators and Free-Electron Lasers
- Physics of Superconductivity and Magnetism
- Geophysics and Sensor Technology
- Venous Thromboembolism Diagnosis and Management
Kazan State Technological University
2020-2023
Saratov State University
2011-2023
Russian Academy of Sciences
2011-2023
Institute of Radio-Engineering and Electronics
2018
University of Washington
2011
Joint Institute for Nuclear Research
2009-2011
Petersburg Nuclear Physics Institute
2011
Using a sample of $1.06\ifmmode\times\else\texttimes\fi{}{10}^{8}$ ${\ensuremath{\psi}}^{\ensuremath{'}}$ decays collected by the BESIII detector, ${\ensuremath{\chi}}_{c0}$ and ${\ensuremath{\chi}}_{c2}$ into ${\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ $\ensuremath{\eta}\ensuremath{\eta}$ are studied. The branching fraction results...
The decays $\chi_{cJ}\to\gamma V$ ($V=\phi, \rho^0, \omega$) are studied with a sample of radiative $\psip\to\gamma\chi_{cJ}$ events in $(1.06\pm0.04)\times 10^{8} \psip$ collected the BESIII detector. branching fractions determined to be: ${\cal B}(\chi_{c1}\to \gamma\phi)=(25.8\pm 5.2\pm 2.3)\times 10^{-6}$, \gamma\rho^0)=(228\pm 13\pm 22)\times and \gamma\omega)=(69.7\pm 7.2\pm 6.6)\times 10^{-6}$. decay $\chi_{c1}\to \gamma\phi$ is observed for first time. Upper limits at 90% confidence...
With a sample of (225.2±2.8)×10(6) J/ψ events registered in the BESIII detector, J/ψ→γπ(+)π(-)η(') is studied using two η(') decay modes: η(')→π(+)π(-)η and η(')→γρ(0). The X(1835), which was previously observed by BESII, confirmed with statistical significance that larger than 20σ. In addition, π(+)π(-)η(') invariant-mass spectrum, X(2120) X(2370), are significances 7.2σ 6.4σ, respectively. For angular distribution radiative photon consistent expectations for pseudoscalar.
Magnonics explores precessional excitations of ordered spins in magnetic materials---so-called spin waves---and their use as information and signal carriers within networks magnonic waveguides. Here, we demonstrate that the nonuniformity internal field magnetization inherent to structures creates a medium graded refractive index for propagating magnetostatic waves can be used steer propagation. The character tuned potentially programmed using applied field, which opens exciting prospects...
We present measurements of the charmonium state h(c)(1P(1)) made with 106x10(6) psi' events collected by BESIII at BEPCII. Clear signals are observed for psi'-->pi0 h(c) and without subsequent radiative decay h(c)-->gamma eta(c). First absolute branching ratios B(psi'-->pi0 h(c)) = (8.4+/-1.3+/-1.0) x 10(-4) B(h(c)-->gamma eta(c)) (54.3+/-6.7+/-5.2)% presented. A statistics-limited determination previously unmeasured width leads to an upper limit Gamma(h(c))<1.44 MeV (90% confidence)....
Using a combination of experiment and simulation, the authors have investigated comprehensively how spin-wave transmission across curved magnonic waveguide is modified through rotation an externally delivered uniform magnetic field. They reveal that, while reasonable when bend magnetized along axis symmetry, can be substantially improved (by factor 2) just rotating field by 15\ifmmode^\circ\else\textdegree\fi{} in particular direction. To explain their results, study landscape internal...
The decay channel Ψ' → π+π− J/Ψ(J/Ψ γp) is studied using a sample of 1.06 × 108 events collected by the BESIII experiment at BEPCII. A strong enhancement threshold observed in p invariant mass spectrum. can be fitted with an S-wave Breit–Wigner resonance function resulting peak M = 1861+6−13 (stat)+7−26 (syst) MeV/c2 and narrow width that Γ < 38 90% confidence level. These results are consistent published BESII results. values do not match well established mesons.
Using samples of 2.25*10^8 J/psi events and 1.06*10^8 psi' collected with the BES III detector, we study f0(980) to a0(980) transitions in processes --> phi chi_c1 pi^0 f0(980), respectively. Evidence for is found a significance 3.4 sigma, while case transition, 1.9 sigma. Measurements upper limits both branching ratios mixing intensities are determined.
The mechanism used to alter the features of propagating spin waves is a key component underpinning functionality high-frequency magnonic devices. Here, using experiment and micromagnetic simulations, we demonstrate feasibility multiplexer in which spin-wave beam toggled between device output branches by polarity small global bias magnetic field. Due anisotropy inherent dispersion magnetostatic waves, phase fronts are asymmetrically tilted relative direction propagation (group velocity). We...
The Dalitz plot of $\eta^{\prime} \to \eta \pi^+ \pi^-$ decay is studied using $(225.2\pm2.8)\times 10^6$ $\jpsi$ events collected with the BESIII detector at BEPCII $e^+e^-$ collider. With largest sample $\eta^{\prime}$ decays to date, parameters are determined in a generalized and linear representation. Also branching fraction $\jpsi \gamma \eta^{\prime}$ be $(4.84\pm0.03\pm0.24)\times 10^{-3}$, where first error statistical second systematic.
Self-generation of dissipative solitons in the magnonic quasicrystal (MQC) active ring resonator is studied theoretically and experimentally. The developed crystal has quasiperiodic Fibonacci type structure. Frequency selectivity MQC together with parametric three-wave decay magnetostatic surface spin wave (MSSW) leads to soliton self-generation. transfer matrix method used describe transmission responses. Besides, model suggested. includes three coupled differential equations describing...
We present results of a study the decay $J/\psi\rightarrow\omega\eta\pi^+\pi^-$ using sample $(225.2\pm2.8)\times10^6$ $J/\psi$ events collected by BESIII detector, and report observation new process $J/\psi\rightarrow \omega X(1870)$ in which X(1870) decays to $a_0(980)\pi$. The statistical significance this is larger than $7.2\sigma$. Signals for f_1(1285)$ \omega\eta(1405)$ are also observed $\eta\pi^+\pi^-$ spectrum, with significances much $10\sigma$.
This study reports on the experimental investigations of a magnetostatic surface wave (MSSW) propagation in magnonic quasicrystal (MQC) with Fibonacci type structure. It is shown that such structure has greater number band gaps and narrower pass bands located between them than periodic These features MQC three-wave decay MSSW are used active ring resonator for eigenmode selection dissipative soliton self-generation.
The periodic structure in the form of two coupled magnonic crystals (MCs) was considered for first time. It shown that variation coupling allows to control effectively characteristics bandgaps spectrum magnetostatic spin waves. Main features formation were investigated basis theoretical and experimental results. comparison with a single MC provided. possibility frequency shift depending on demonstrated region Bragg resonance. such gives additional opportunities create microwave filters phase...
The decays psi'->gamma pi^0, gamma eta and eta' are studied using data collected with the BESIII detector at BEPCII e^+e^- collider. Processes pi^0 observed for first time signal significances of 4.6 sigma 4.3 sigma, respectively. branching fractions determined to be: B(psi'->gamma pi^0)=(1.58+-0.40+-0.13)x10^{-6}, eta)=(1.38+-0.48+-0.09)x10^{-6}, eta')=(126+-3+-8) x 10^{-6}, where errors statistical second ones systematic.
Self-generation of chaotic dissipative soliton trains was observed in an active ring resonator based on 1-D periodical ferromagnetic structure (1-D magnonic crystal) a groove's grating form. The grooves were cut off the surface yttrium iron garnet film with help scribing technique and placed perpendicularly to magnetostatic wave (MSSW) propagation. presence three magnon decay processes MSSW, frequency filtration, passive synchronization spin-wave self-modulation frequencies caused...
Decays of $\chi_{c1}$ to vector meson pairs $\phi\phi$, $\omega\omega$ and $\omega\phi$ are observed for the first time using $(106\pm4)\times 10^6$ $\psip$ events accumulated at BESIII detector BEPCII $e^+e^-$ collider. The branching fractions measured be $(4.4\pm 0.3\pm 0.5)\times 10^{-4}$, $(6.0\pm 0.7)\times $(2.2\pm 0.6\pm 0.2)\times 10^{-5}$, $\chi_{c1}\to \phi\phi$, $\omega\omega$, $\omega\phi$, respectively. observation decays into a pair mesons indicates that hadron helicity...
The spectral characteristics of the hybrid spin-electromagnetic waves in multiferroic layered structure magnonic crystal (MC)-ferroelectric were theoretically and experimentally investigated. main features bandgaps formation such a compared with case single MC. possibility bandgap control varying electric field is demonstrated.
We report on double-differential inclusive cross-sections of the production secondary protons, deuterons, and charged pions kaons, in interactions with a 5% nuclear interaction length thick stationary beryllium target, +8.9 GeV/c proton pion beam, -8.0 beam. Results are given for particles angles between 20 125 degrees.
This study reports on the experimental results of chaotic microwave (MW) pulse generation in a ferromagnetic film ring oscillator under pulse-modulated (PM) and narrowband noise forces. Chaotic dynamics investigated self-oscillatory system is produced through three-wave parametric interactions spin waves. It shown, that periodical sequences MW pulses are generated PM force solitary force. Such formed forced chaos synchronization. For description synchronization phenomenon, model with...
We report on double-differential inclusive cross-sections of the production secondary protons and charged pions, in interactions with a 5% λ abs thick stationary beryllium target, proton pion beams momentum from ±3 GeV/c to ±15 GeV/c. Results are given for particles angles 20° <θ<125°.
A self-generation of chaotic dissipative spin-wave multisoliton complexes has been observed experimentally. Localized in time, these patterns are formed a passively Q-switched and mode-locked magnetic film feedback ring due to the competing three- four-wave nonlinear interactions. Such competition induces modulation instability that leads formation incoherent one-color bound solitons embedded three-wave solitonlike pulses. The development symmetry-breaking causes transition from multicolor ones.