D. N. Svirida
A5025070676- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Stochastic processes and statistical mechanics
- Nuclear physics research studies
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Statistical Methods and Bayesian Inference
- Fusion materials and technologies
- Dark Matter and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Markov Chains and Monte Carlo Methods
- Pulsars and Gravitational Waves Research
- High-pressure geophysics and materials
Institute for Theoretical and Experimental Physics
2015-2024
Ball State University
2024
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2019-2024
Kurchatov Institute
2015-2024
Argonne National Laboratory
2012-2024
Variable Energy Cyclotron Centre
2020-2024
Wayne State University
2020-2024
Wuhan University of Science and Technology
2024
Yale University
2020-2024
Abilene Christian University
2019-2023
DANSS is a highly segmented 1~m${}^3$ plastic scintillator detector. Its 2500 one meter long strips have Gd-loaded reflective cover. The detector placed under an industrial 3.1~$\mathrm{GW_{th}}$ reactor of the Kalinin Nuclear Power Plant 350~km NW from Moscow. distance to core varied on-line 10.7~m 12.7~m. building provides about 50~m water-equivalent shielding against cosmic background. detects almost 5000 $\widetilde\nu_e$ per day at closest position with background less than 3$\%$....
The DANSS project is aimed at creating a relatively compact neutrino spectrometer which does not contain any flammable or other dangerous liquids and may therefore be located very close to the core of an industrial power reactor. As result, it expected that high flux would provide about 15,000 IBD interactions per day in detector with sensitive volume 1 m3. High segmentation plastic scintillator will allow suppress background down ∼1% level. Numerous tests performed simplified pilot...
We report the first measurements of A_N absolute value and shape in -t range from 0.0015 to 0.010GeV/c^2 with a precision better than 0.005 for each data point using polarized atomic hydrogen gas jet target 100 GeV RHIC proton beam.
Precise measurements of the single spin asymmetry ${A}_{N}$, and double ${A}_{NN}$, in proton-proton ($pp$) elastic scattering region four-momentum transfer squared $0.001<\ensuremath{-}t<0.032\text{ }\text{ }(\mathrm{GeV}/c{)}^{2}$ have been performed using a polarized atomic hydrogen gas jet target Relativistic Heavy Ion Collider (RHIC) proton beam. We present ${A}_{N}$ ${A}_{NN}$ at center-of-mass energies $\sqrt{s}=6.8$ 13.7 GeV. These spin-dependent observables are sensitive to...
Abstract The SuperFGD detector will be a novel and important upgrade to the ND280 near for both T2K Hyper-Kamiokande projects. main goal of is reduce systematic uncertainties associated with neutrino flux cross-section modeling future studies oscillations using experiments. upgraded able perform full exclusive reconstruction final state from neutrino-nucleus interactions, including measurements low momentum protons, pions first time, event-by event neutron kinematics. Precisely understanding...
The analyzing power for proton-carbon elastic scattering in the Coulomb-nuclear interference region of momentum transfer, 9.0×10−3<−t<4.1×10−2 (GeV/c)2, was measured with a 21.7 GeV/c polarized proton beam at Alternating Gradient Synchrotron Brookhaven National Laboratory. ratio hadronic spin-flip to nonflip amplitude, r5, obtained from be Rer5=0.088±0.058 and Imr5=−0.161±0.226.Received 11 February 2002DOI:https://doi.org/10.1103/PhysRevLett.89.052302©2002 American Physical Society
Wavelength shifting fibers are widely used for light collection from scintillation counters, which allow connection of various planes to relatively small photocathodes photodetectors and especially tiny silicon photo-multipliers. In October 2020 Kuraray announced production a new branch faster fibers. We performed comparison the fiber YS-2 mature Y-11. The demonstrated decay time nearly two times shorter than that Y-11: $\approx$4.0 ns versus $\approx$7.4 ns. At same its yield attenuation...
The first result of the pp2pp experiment at RHIC on elastic scattering polarized protons sqrt{s} = 200 GeV is reported here. exponential slope parameter b diffractive peak cross section in t range 0.010 <= |t| 0.019 (GeV/c)^2 was measured to be 16.3 +- 1.6 (stat.) 0.9 (syst.) (GeV/c)^{-2} .
The Brookhaven Relativistic Heavy Ion Collider (RHIC) has been providing collisions of polarized protons at a beam energy 100 GeV since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from injection to GeV. However, the intrinsic spin resonances beyond are about factor 2 stronger than those below making it important examine impact these strong on survival and tolerance for vertical orbit distortions. Polarized were first accelerated...
The Polarized Atomic Hydrogen Gas Jet Target polarimeter is employed by the Relativistic Heavy Ion Collider (RHIC) to measure absolute polarization of each colliding proton beam. Polarimeter detectors and data acquisition were upgraded in 2015 increase solid angle, energy range, resolution. These upgrades advanced systematic error analysis along with improved beam intensity RHIC runs (E_{beam}=100 GeV) 2017 (255 allowed us greatly reduce statistical uncertainties for elastic spin...
Cross sections for pi+-p elastic scattering have been measured to high precision, beam momenta between 800 and 1240 MeV/c, by the EPECUR Collaboration, using ITEP proton synchrotron. The data precision allows comparisons of existing partial-wave analyses (PWA) on a level not possible previously. These imply that updated PWA are required.
Abstract The DANSS detector (Alekseev et al. in JINST 11:P11011, 2016) is located directly below a commercial reactor core at the Kalinin Nuclear Power Plant. Such position provides an overburden about 50 m.w.e. vertical direction. In terms of cosmic rays it occupies intermediate between surface and underground detectors. sensitive volume cubic meter plastic scintillator with fine segmentation combined PMT SiPM readout, surrounded by multilayer passive active shielding. can reconstruct muon...
Abstract DANSS is a solid scintillator antineutrino detector located right below 3 GW th reactor of the Kalininskaya NPP. One cubic meter sensitive volume with fine segmentation makes it possible to achieve an unprecedented counting rate about 5000 IBD events per day, keeping level cosmic background 2%. New physics sterile neutrino searched for by performing spectral measurements at varying distance from core. Contributions applied include power and fuel analysis. Commissioned in 2016,...
We report on the first measurement of single spin analyzing power (A_N) at sqrt(s)=200GeV, obtained by pp2pp experiment using polarized proton beams Relativistic Heavy Ion Collider (RHIC). Data points were measured in four momentum transfer t range 0.01 < |t| 0.03 (GeV/c)^2. Our result, averaged over whole t-interval is about one standard deviation above calculation, which uses interference between electromagnetic spin-flip amplitude and hadronic non-flip amplitude, source A_N. The...
Recent measurements of spin-rotation parameters in elastic ${\ensuremath{\pi}}^{+}p$ scattering are marked disagreement with predictions the Carnegie-Mellon$\ensuremath{-}$Berkeley and Karlsruhe-Helsinki analyses. Using method Barrelet, we show how this discrepancy can be removed. We then Barrelet transformation alters partial-wave amplitudes. The effect unitarity analyticity constraints is also considered.
The analysis of high-precision $\pi^{\pm}p \to \pi^{\pm}p$ cross section data from the EPECUR Collaboration based on multichannel $K$-matrix approach is presented.The sharp structures seen in these are studied terms both opening thresholds and new resonance contributions. Some prominent features found to be due $K\Sigma$ channel. However, a complete description improved with addition two narrow resonant at $W\sim 1.686$ 1.720$ GeV. These interpreted as manifestations $S_{11}$ $P_{11}$...