A. Lebedev
A5114375422- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Nuclear reactor physics and engineering
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Stochastic processes and statistical mechanics
- X-ray Spectroscopy and Fluorescence Analysis
- Geomagnetism and Paleomagnetism Studies
- Pediatric Urology and Nephrology Studies
- Statistical Methods and Bayesian Inference
- Ionosphere and magnetosphere dynamics
Iowa State University
2016-2025
Brookhaven National Laboratory
2016-2025
Ball State University
2022-2024
Argonne National Laboratory
2014-2024
Wuhan University of Science and Technology
2024
Variable Energy Cyclotron Centre
1998-2024
Wayne State University
2018-2024
Yale University
2020-2024
AGH University of Krakow
2019-2024
Warsaw University of Technology
2020-2024
We report the results of a search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ disappearance by Main Injector Neutrino Oscillation Search [D. G. Michael et al. (MINOS), Phys. Rev. Lett. 97, 191801 (2006).]. The experiment uses two detectors separated 734 km to observe beam neutrinos created Neutrinos at facility Fermi National Accelerator Laboratory. data were collected in first 282 days operations and correspond an exposure $1.27\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target....
The velocity of a ∼3 GeV neutrino beam is measured by comparing detection times at the near and far detectors MINOS experiment, separated 734 km. A total 473 detector events was used to measure (v−c)/c=5.1±2.9×10−5 (at 68% C.L.). By correlating energies 258 charged-current their arrival detector, limit imposed on mass mν<50 MeV/c2 (99% C.L.).Received 4 June 2007DOI:https://doi.org/10.1103/PhysRevD.76.072005©2007 American Physical Society
A BSTRACT Inclusive e ± p single and double differential cross sections for neutral charged current deep inelastic scattering processes are measured with the H1 detector at HERA. The data were taken a centre-of-mass energy of $ \sqrt {s} = {319} GeV total integrated luminosity 333.7 pb −1 shared between two lepton beam charges longitudinal polarisation modes. in range negative four-momentum transfer squared, Q 2 , 60 50 000 Bjorken x 0 . 0008 65. measurements combined earlier published...
Employing the Bonn–Gatchina partial wave analysis framework (PWA), we have analyzed HADES data of reaction p(3.5GeV)+p→pK+Λ. This might contain information about kaonic cluster "ppK−" (with quantum numbers JP=0− and total isospin I=1/2) via its decay into pΛ. Due to interference effects in our coherent description data, a hypothetical K‾NN (or, specifically "ppK−") signal need not necessarily show up as pronounced feature (e.g. peak) an invariant mass spectrum like Our PWA includes variety...
A measurement of direct photon production in ${}^{208}\mathrm{Pb}{+}^{208}\mathrm{Pb}$ collisions at $158A$ GeV has been carried out the CERN WA98 experiment. The invariant yield photons central is extracted as a function transverse momentum interval $0.5<{p}_{T}<4\mathrm{GeV}/c$. significant signal, compared to statistical and systematical errors, seen ${p}_{T}>1.5\mathrm{GeV}/c$. result constitutes first observation ultrarelativistic heavy-ion collisions. It could be for diagnosis...
Inclusive $$ep$$ double differential cross sections for neutral current deep inelastic scattering are measured with the H1 detector at HERA. The data were taken a lepton beam energy of $$27.6$$ GeV and two proton energies $$E_p=460$$ 575 corresponding to centre-of-mass 225 252 GeV, respectively. measurements cover region $$6.5\times 10^{-4} \le x 0.65$$ $$35\le Q^2 800$$ $$^2$$ up $$y=0.85$$ . used together previously published $$E_p=920$$ lower $$Q^2$$ , $$575$$ $$920$$ extract longitudinal...
Abstract A precision measurement of jet cross sections in neutral current deep-inelastic scattering for photon virtualities $$5.5<Q^2 <80\,\mathrm {GeV}^2 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>5.5</mml:mn><mml:mo><</mml:mo><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo><</mml:mo><mml:mn>80</mml:mn><mml:mspace /><mml:msup><mml:mrow><mml:mi>GeV</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> and...
Abstract Charged particle multiplicity distributions in positron-proton deep inelastic scattering at a centre-of-mass energy $$\sqrt{s}=319$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>319</mml:mn> </mml:mrow> </mml:math> GeV are measured. The data collected with the H1 detector HERA corresponding to an integrated luminosity of 136 pb $$^{-1}$$ <mml:msup> <mml:mrow /> <mml:mo>-</mml:mo>...
The 5.4 kton MINOS far detector has been taking charge-separated cosmic ray muon data since the beginning of August, 2003 at a depth 2070 m.w.e. in Soudan Underground Laboratory, Minnesota, USA. with both forward and reversed magnetic field running configurations were combined to minimize systematic errors determination underground charge ratio. When averaged, two independent analyses find ratio be...
Measurement of the chemical and isotopic composition cosmic rays is essential for precise understanding their propagation in galaxy. While model parameters are mainly determined using B/C ratio, study extended sets ratios can provide stronger constraints on models. In this paper, relative abundances light-nuclei lithium, beryllium, boron, carbon presented. The secondary-to-primary Li/C, Be/C, have been measured kinetic energy range 0.35–45 GeV nucleon−1. ratio 7Li/6Li also magnetic rigidity...
The variety of isotopes in cosmic rays allows us to study different aspects the processes that undergo between time they are produced and their arrival heliosphere. In this paper, we present measurements isotopic ratios 2H/4He, 3He/4He, 6Li/7Li, 7Be/(9Be+10Be), 10B/11B range 0.2–1.4 GeV kinetic energy per nucleon. based on data collected by Alpha Magnetic Spectrometer, AMS-01, during STS-91 flight 1998 June.
The strong coupling constant αs is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic ep scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) QCD predictions. dependence of NNLO predictions resulting value αs(mZ) Z-boson mass mZ are studied as a function choice renormalisation factorisation scales. Using data together, to be αs(mZ)=0.1157(20)exp(29)th . Complementary, together with parton distribution...
Two-particle correlations of direct photons were measured in central 208Pb+208Pb collisions at 158A GeV. The invariant interferometric radii extracted for 100<K(T)<300 MeV/c and compared to from charged pion correlations. yield soft photons, K(T)<300 MeV/c, was the correlation strength theoretical calculations.
We present data on dielectron emission in proton induced reactions a Nb target at 3.5 GeV kinetic beam energy measured with HADES installed GSI. The represent the first high statistics measurement of proton-induced radiation from cold nuclear matter kinematic regime, where strong medium effects are expected. Combined good mass resolution 2%, it is sensitive to changes spectral functions vector mesons, as predicted by models for hadrons rest or small relative momenta. Comparing e+e invariant...