A5103105872- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Neutrino Physics Research
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Atomic and Molecular Physics
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Quantum, superfluid, helium dynamics
- Scientific Computing and Data Management
- Advanced NMR Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Superconducting and THz Device Technology
- Cloud Computing and Resource Management
- Distributed and Parallel Computing Systems
- Astronomy and Astrophysical Research
- Superconducting Materials and Applications
- Gamma-ray bursts and supernovae
- Advanced Data Storage Technologies
Karlsruhe Institute of Technology
2014-2024
Krasnodar University of Ministry of Internal Affairs of Russia
2022
Ministry of Internal Affairs of the Russian Federation
2022
National Guard Military Academy of Ukraine
2022
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2009-2020
Argonne National Laboratory
2013-2019
Lomonosov Moscow State University
2017
University of Insubria
2015
Joint Institute for Nuclear Research
2009-2012
KU Leuven
2002-2011
Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering positrons are measured the first time with transverse target polarization. The asymmetry depends on azimuthal angles both pion ($\ensuremath{\phi}$) and spin axis (${\ensuremath{\phi}}_{S}$) about virtual-photon direction relative to lepton plane. extracted Fourier component $\mathbf{⟨}\mathrm{sin}(\ensuremath{\phi}+{\ensuremath{\phi}}_{S}){\mathbf{⟩}}_{UT}^{\ensuremath{\pi}}$ is a...
Precise measurements of the spin structure functions proton ${g}_{1}^{p}(x,{Q}^{2})$ and deuteron ${g}_{1}^{d}(x,{Q}^{2})$ are presented over kinematic range $0.0041\ensuremath{\le}x\ensuremath{\le}0.9$ $0.18\text{ }\text{ }{\mathrm{GeV}}^{2}\ensuremath{\le}{Q}^{2}\ensuremath{\le}20\text{ }{\mathrm{GeV}}^{2}$. The data were collected at HERMES experiment DESY, in deep-inelastic scattering 27.6 GeV longitudinally polarized positrons off hydrogen deuterium gas targets internal to HERA storage...
Azimuthal single-spin asymmetries of lepto-produced pions and charged kaons were measured on a transversely polarized hydrogen target. Evidence for naive-T-odd, transverse-momentum-dependent parton distribution function is deduced from non-vanishing Sivers effects pi+, pi0, K+, K-, as well in the difference pi+ pi- cross sections.
The beam-spin asymmetry in hard electroproduction of photons has been measured. data have accumulated by the HERMES experiment at DESY using HERA 27.6 GeV longitudinally polarized positron beam and an unpolarized hydrogen-gas target. azimuthal distribution produced angle $\ensuremath{\varphi}$ relative to lepton scattering plane was determined with respect helicity state incoming beam. analyzing power $\mathrm{sin}\ensuremath{\varphi}$ moment measured be...
Results are reported from the HERMES experiment at HERA on a measurement of neutron spin structure function $g_1^n(x,Q^2)$ in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident $^3$He internal gas target. The data cover kinematic range $0.023
Single-spin asymmetries for semi-inclusive pion production in deep-inelastic scattering have been measured the first time. A significant target-spin asymmetry of distribution azimuthal angle straight phi relative to lepton plane was formed pi(+) electroproduction on a longitudinally polarized hydrogen target. The corresponding analyzing power sinstraight moment cross section is 0.022+/-0.005+/-0.003. This result can be interpreted as effect terms involving chiral-odd spin functions...
Single-spin asymmetries for pions and charged kaons are measured in semi-inclusive deep-inelastic scattering of positrons electrons off a transversely nuclear-polarized hydrogen target. The dependence the cross section on azimuthal angles target polarization (phi_S)and produced hadron (phi) is found to have substantial sin(phi+phi_S) modulation production pi+, pi- K+. This Fourier component can be interpreted terms non-zero transversity distribution functions favored disfavored Collins...
The EDELWEISS-II Collaboration has completed a direct search for WIMP dark matter with an array of ten 400-g cryogenic germanium detectors in operation at the Laboratoire Souterrain de Modane. combined use thermal phonon sensors and charge collection electrodes interleaved geometry enables efficient rejection γ-induced radioactivity as well near-surface interactions. A total effective exposure 384 kg d been achieved, mostly coming from fourteen months continuous operation. Five nuclear...
We report on a search for low-energy (E < 20 keV) WIMP-induced nuclear recoils using data collected in 2009 - 2010 by EDELWEISS from four germanium detectors equipped with thermal sensors and an electrode design (ID) which allows to efficiently reject several sources of background. The indicate no evidence exponential distribution that could be attributed WIMP elastic scattering after exposure 113 kg.d. For WIMPs mass 10 GeV, the observation one event region results 90% CL limit 1.0x10^-5 pb...
This paper reports on the development of a technology involving $$^{100}\hbox {Mo}$$ -enriched scintillating bolometers, compatible with goals CUPID, proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( $$\sim 1~\hbox {kg}$$ ), high optical quality, radiopure -containing zinc and lithium molybdate crystals have been produced used develop performance single detector modules based 0.2–0.4 kg bolometers. In particular, energy resolution...
In this paper we propose a distributed architecture to provide machine learning practitioners with set of tools and cloud services that cover the whole development cycle: ranging from models creation, training, validation testing serving as service, sharing publication. such respect, DEEP-Hybrid-DataCloud framework allows transparent access existing e-Infrastructures, effectively exploiting resources for most compute-intensive tasks coming cycle. Moreover, it provides scientists...
The flavor asymmetry of the light quark sea nucleon is determined in kinematic range $0.02<x<0.3$ and $1<{Q}^{2}<10{\mathrm{GeV}}^{2}$ for first time from semi-inclusive deep-inelastic scattering. quantity $[\overline{d}(x)\ensuremath{-}\overline{u}(x)]/[u(x)\ensuremath{-}d(x)]$ derived a relationship between yields positive negative pions unpolarized hydrogen deuterium targets. $\overline{d}\ensuremath{-}\overline{u}$ found to be nonzero $x$ dependent, showing an excess $\overline{d}$ over...
A single-spin asymmetry in the azimuthal distribution of neutral pions relative to lepton scattering plane has been measured for first time deep-inelastic positrons off longitudinally polarized protons. The analyzing power sinφ moment cross section is 0.019±0.007(stat)±0.003(syst). This result compared asymmetries charged pion production same kinematic range. π0 size as π+ and shows a similar dependence on relevant variables. described by phenomenological calculation based fragmentation...
The momentum and helicity density distributions of the strange quark sea in nucleon are obtained leading order from charged-kaon production deep-inelastic scattering on deuteron. extracted spin-averaged K+/- multiplicities, inclusive double-spin asymmetries for polarized positrons by a deuterium target. shape distribution is softer than that average ubar dbar quarks. In region measurement 0.02 < x 0.6 Q^2 > 1.0 GeV^2, zero within experimental uncertainties.
The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. total data set represents 614 kg.d equivalent exposure. A straightforward method combination was chosen its simplicity before were exchanged between experiments. are interpreted in terms limits on spin-independent WIMP-nucleon cross-section. For a WIMP mass 90 GeV/c^2, where this analysis is most sensitive, cross-section 3.3 x 10^{-44} cm^2 excluded at...
The azimuthal cos{\phi} and cos2{\phi} modulations of the distribution hadrons produced in unpolarized semi-inclusive deep-inelastic scattering electrons positrons off hydrogen deuterium targets have been measured HERMES experiment. For first time these were determined a four-dimensional kinematic space for positively negatively charged pions kaons separately, as well unidentified hadrons. These dependences are sensitive to transverse motion polarization quarks within nucleon via, e.g.,...
We report on a dark matter search for Weakly Interacting Massive Particle (WIMP) in the mass range $$m_{\chi } \in [4, 30]\,\mathrm{GeV/}c^2$$ with EDELWEISS-III experiment. A 2D profile likelihood analysis is performed data from eight selected detectors lowest energy thresholds leading to combined fiducial exposure of 496 kg-days. External backgrounds $$\gamma $$ - and $$\beta -radiation, recoils $$^{206}\mathrm{Pb}$$ neutrons as well detector intrinsic were modelled outside region interest...
Beam-helicity and beam-charge asymmetries in the hard exclusive leptoproduction of real photons from an unpolarised hydrogen target by a 27.6 GeV lepton beam are extracted HERMES data set 2006-2007 using missing-mass event selection technique. The asymmetry amplitudes this more precise than those earlier 1996-2005 previously analysed same manner HERMES. results two sets compatible with each other. Results these combined constitute most amplitude measurements made kinematic region
We make use of the EDELWEISS-III array germanium bolometers to search for electron interactions at keV scale induced by phenomena beyond Standard Model. A 90% C.L. lower limit is set on lifetime decaying invisibles, $\tau > 1.2\times 10^{24}$ years. investigate emission axions or axionlike particles (ALPs) Sun, constraining coupling parameters $g_{ae}<1.1\times 10^{-11}$ and $g_{ae}\times g_{aN}^{\rm eff} < 3.5\times 10^{-17}$ in massless limit. also directly absorption bosonic dark matter...
We present the results of a search for elastic scattering from galactic dark matter in form Weakly Interacting Massive Particles (WIMPs) 4-30 GeV/$c^2$ mass range. make use 582 kg-day fiducial exposure an array 800 g Germanium bolometers equipped with set interleaved electrodes full surface coverage. searched specifically $\sim 2.5-20$ keV nuclear recoils inside detector volume. As illustration number observed events 5 (resp. 20) WIMPs are 9 4), compared to expected background 6.1 1.4). A...
We present a measurement of the longitudinal spin asymmetry A(||) in photoproduction pairs hadrons with high transverse momentum p(T). Data were accumulated by HERMES experiment using 27.5 GeV polarized positron beam and hydrogen target internal to HERA storage ring. For h(+)h(-) p(h(1))(T)>1.5 GeV/c p(h(2))(T)>1.0 GeV/c, measured is = -0. 28+/-0.12(stat)+/-0.02(syst). This negative value contrast positive asymmetries typically deep inelastic scattering from protons, interpreted arise gluon...
Double-spin asymmetries of semiinclusive cross sections for the production identified pions and kaons have been measured in deep inelastic scattering polarized positrons on a deuterium target. Five helicity distributions including those three sea quark flavors were extracted from these data together with reanalyzed previous hydrogen These are consistent zero all flavors. A recently predicted flavor asymmetry polarization light appears to be disfavored by data.