D. Romanov
A5101822626- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Energy Efficient Wireless Sensor Networks
- X-ray Spectroscopy and Fluorescence Analysis
- Data Quality and Management
- High-pressure geophysics and materials
- Dark Matter and Cosmic Phenomena
- Carbon Nanotubes in Composites
- Microbial Inactivation Methods
- Radio Wave Propagation Studies
- Scientific Computing and Data Management
- Digital and Cyber Forensics
- Quantum Mechanics and Applications
- Neutrino Physics Research
- Graphene research and applications
- Distributed Sensor Networks and Detection Algorithms
- Silicon and Solar Cell Technologies
- Particle Accelerators and Free-Electron Lasers
Moscow Engineering Physics Institute
2009-2023
Thomas Jefferson National Accelerator Facility
2019-2023
Old Dominion University
2020-2023
William & Mary
2023
Williams (United States)
2023
Messiah College
2023
Institute of Engineering Physics
2009-2020
North Carolina Agricultural and Technical State University
2019
Institute for Water and Environmental Problems of the Siberian Branch of the Russian Academy of Sciences
2015
Institute of Water Problems
2015
How the bulk of Universe's visible mass emerges and how it is manifest in existence properties hadrons are profound questions that probe into heart strongly interacting matter. Paradoxically, lightest pseudoscalar mesons appear to be key further understanding emergent structure mechanisms. These mesons, namely pion kaon, Nambu-Goldstone boson modes QCD. Unravelling their partonic interplay between Higgs-boson mechanisms a common goal three interdependent approaches -- continuum QCD...
We report measurements of the photon beam asymmetry $\Sigma$ for reactions $\vec{\gamma}p\to p\pi^0$ and p\eta $ from GlueX experiment using a 9 GeV linearly-polarized, tagged incident on liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as function proton momentum transfer, possess greater precision than previous $\pi^0$ are first $\eta$ this energy regime. results compared with theoretical predictions based $t$-channel, quasi-particle exchange constrain...
The GlueX experiment at Jefferson Lab ran with its first commissioning beam in late 2014 and the spring of 2015. Data were collected on both plastic liquid hydrogen targets, much detector has been commissioned. All systems are now performing or near design specifications events being fully reconstructed, including exclusive production π0, η ω mesons. Linearly-polarized photons successfully produced through coherent bremsstrahlung polarization transfer to ρ observed.
The explicit breaking of the axial symmetry by quantum fluctuations gives rise to so-called anomaly. This phenomenon is solely responsible for decay neutral pion π0 into two photons (γγ), leading its unusually short lifetime. We precisely measured width Γ [Formula: see text] process. differential cross sections photoproduction at forward angles were on targets, carbon-12 and silicon-28, yielding text], where stat. denotes statistical uncertainty syst. systematic uncertainty. combined results...
We study the electronic structure of (n,0) zigzag carbon nanotubes by means two complementary numerical methods. Using semiempirical PM3 method, we carry out quantum-chemical calculations for tube fragments different symmetry and size, which represent these tubes. tight-binding proceed in parallel to determine band The effect cluster size on frontier orbitals stability is investigated (6,0) tube. show that highest occupied molecular (HOMOs) lowest unoccupied (LUMOs) are localized edge atoms....
We report on the measurement of beam asymmetry $\mathrm{\ensuremath{\Sigma}}$ for reactions $\stackrel{P\vec}{\ensuremath{\gamma}}p\ensuremath{\rightarrow}p\ensuremath{\eta}$ and $\stackrel{P\vec}{\ensuremath{\gamma}}p\ensuremath{\rightarrow}p{\ensuremath{\eta}}^{\ensuremath{'}}$ from GlueX experiment using an 8.2--8.8-GeV linearly polarized tagged photon incident a liquid hydrogen target in Hall D at Jefferson Laboratory. These measurements are made as function momentum transfer...
Short range correlated nucleon-nucleon ($NN$) pairs are an important part of the nuclear ground state. They typically studied by scattering electron from one nucleon in pair and detecting its spectator partner (``spectator-nucleon tagging''). The Electron Ion Collider (EIC) should be able to detect these nucleons, since they boosted high momentum laboratory frame ion beam. To determine feasibility studies with planned EIC detector configuration, we have simulated quasielastic for two beam...
We propose to enhance the kaon identification capabilities of GlueX detector by constructing an FDIRC (Focusing Detection Internally Reflected Cherenkov) utilizing decommissioned BaBar DIRC components. The would significantly physics program allowing one search for and study hybrid mesons decaying into final states. Such systematic studies states are essential inferring quark flavor content conventional mesons. reuse one-third synthetic fused silica bars that were utilized in DIRC. A new...
Abstract Real-time data processing is a frontier field in experimental particle physics. The application of FPGAs at the trigger level used by many current and planned experiments (CMS, LHCb, Belle2, PANDA). Usually they use conventional algorithms. LHCb has implemented Machine Learning (ML) elements for real-time with triggered readout system that runs most ML algorithms on computer farm. work described this article aims to test ML-FPGA streaming acquisition. There are working area have lot...
Real-time data processing is a frontier field in experimental particle physics.Machine Learning methods are widely used and have proven to be very powerful physics.The growing computational power of modern FPGA boards allows us add more sophisticated algorithms for real time processing.Many tasks could solved using Machine (ML) which naturally suited architectures.The FPGA-based machine learning algorithm provides an extremely low, sub-microsecond, latency decision makes information-rich...
We report measurements of the photon beam asymmetry $\mathrm{\ensuremath{\Sigma}}$ for reaction $\stackrel{P\vec}{\ensuremath{\gamma}}p\ensuremath{\rightarrow}{K}^{+}{\mathrm{\ensuremath{\Sigma}}}^{0}$(1193) using GlueX spectrometer in Hall D at Jefferson Lab. Data were collected by a linearly polarized energy range 8.2--8.8 GeV incident on liquid hydrogen target. The was measured as function Mandelstam variable $t$, and single value extracted events produced $u$ channel. These are first...
The past few years has seen tremendous progress in our understanding of short-range correlated (SRC) pairing nucleons within nuclei, much it coming from electron scattering experiments leading to the break-up an SRC pair. interpretation these rests on assumptions about mechanism reaction. These can be directly tested by studying pairs using alternate probes, such as real photons. We propose a 30-day experiment Hall D photon beam, nuclear targets, and GlueX detector its standard configuration...
Advanced detector R&D requires performing computationally intensive and detailed simulations as part of the detector-design optimization process. We propose a general approach to this process based on Bayesian machine learning that encodes requirements. As case study, we focus design dual-radiator Ring Imaging Cherenkov (dRICH) under development particle-identification system at future Electron-Ion Collider (EIC). The EIC is US-led frontier accelerator project for nuclear physics, which has...
We report on the measurement of one-dimensional charged kaon correlation functions using 600~GeV/{\it c} $\Sigma^-$, $\pi^-$ and 540~GeV/{\it $p$ beams from SELEX~(E781) experiment at Fermilab Tevatron. $K^{\pm}K^{\pm}$ are studied for three transverse pair momentum, $k_T$, ranges parameterized by a Gaussian form. The emission source radii, $R$, strength, $\lambda$, extracted. analysis shows decrease radii with increasing momentum all beam types.
The cross section of atomic electron Compton scattering γ+e→γ′+e′ was measured in the 4.400–5.475 GeV photon beam energy region by PrimEx collaboration at Jefferson Lab with an accuracy 2.6% and less. results are consistent theoretical predictions that include next-to-leading order radiative corrections. measurements provide first high precision test this elementary QED process energies greater than 0.1 GeV.
Currently, in large cities, there is a steady tendency to increase the spatial density of telecommunication systems. The saturation radio spectrum with analog and digital systems used solve problems communication television allows improve technologies semi-active radar detection determination coordinates low-altitude object on their basis. Conducting surveillance using non-radar transmitters often called extraneous or parasitic radiation sources. advantages such are minimization deployment...
The paper presents the results of study dielectric blood characteristics - 20% solution human albumin, 40% glucose and 0,9% NaCl, at temperature ranging from 30 to 42 °C frequency 0,6 GHz. At 37 albumin showed an abrupt increase in absorption. hysteresis absorption heating-cooling cycles has been revealed. Addition nanoparticles iron oxide carbon leads change dependence as compared nanoparticle-free solution.
Machine learning (ML) is no new concept in the high-energy physics community, fact, many ML techniques have been employed since early 80s to deal with a broad spectrum of problems. In this paper, we present novel technique separate electrons from pions Gas Electron Multiplier Transition Radiation Detector (GEM TRD) using deep learning. The Artificial Neural Network (ANN) model trained on Monte Carlo data simulated ATHENA-based detector and simulation framework for Electron-Ion Collider (EIC)...
Abstract JANA2 is a multi-threaded event reconstruction framework being developed for Experimental Nuclear Physics. It an LDRD 1 funded project that will be the successor of original JANA framework. near complete rewrite emphasizing C++ language features have only become available since introduction C++11 standard. Features such as shared pointers, native threading, and atomics are employed. This paper outlines status project.
We study HBT interferometry of ΛΛ pairs produced in ∑− A interactions using a spin composition measurement with data taken by SELEX, which accumulated during the 1996–97 fixed target run at Fermilab. While pair range four-momentum difference Q 1.5 GeV it was found to be consistent statistical mixture. For system one fraction expectation for also estimated dimension production region.