658 results match your criteria: "NRC "Kurchatov Institute"[Affiliation]"
Eur Phys J C Part Fields
June 2021
University of Wisconsin - Madison, Madison, WI USA.
Production cross sections of the Higgs boson are measured in the ( ) decay channel. A data sample of proton-proton collisions at a center-of-mass energy of 13 , collected by the CMS detector at the LHC and corresponding to an integrated luminosity of 137 is used. The signal strength modifier , defined as the ratio of the Higgs boson production rate in the channel to the standard model (SM) expectation, is measured to be at a fixed value of .
View Article and Find Full Text PDFThe rate for Higgs ( ) bosons production in association with either one ( ) or two ( ) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton-proton collisions recorded at a center-of-mass energy of by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137 . The analysis is aimed at events that contain , , or decays and each of the top quark(s) decays either to lepton+jets or all-jet channels.
View Article and Find Full Text PDFEur Phys J C Part Fields
June 2021
Institute of Physics, Jagiellonian University, Cracow, Poland.
Neutrinoless double- decay of Ge is searched for with germanium detectors where source and detector of the decay are identical. For the success of future experiments it is important to increase the mass of the detectors. We report here on the characterization and testing of five prototype detectors manufactured in inverted coaxial (IC) geometry from material enriched to 88% in Ge.
View Article and Find Full Text PDFEur Phys J A Hadron Nucl
June 2021
Department of Physics, University of York, Heslington, York, Y010 5DD UK.
The quasifree photon beam asymmetry, , has been measured at photon energies, , from 390 to 610 MeV, corresponding to center of mass energy from 1.271 to 1.424 GeV, for the first time.
View Article and Find Full Text PDFSmall
December 2021
Ioffe Institute, Politekhnicheskaya St. 26, Saint Petersburg, 194021, Russia.
Engineering of the 2D materials' electronic structure is at the forefront of nanomaterials research nowadays, giving an advance in the development of next-generation photonic devices, e-sensing technologies, and smart materials. Herein, employing core-level spectroscopy methods combined with density functional theory (DFT) modeling, the modification of the graphenes' valence band (VB) upon its derivatization by carboxyls and ketones is revealed. The appearance of a set of localized states in the VB of graphene related to molecular orbitals of the introduced functionalities is signified both experimentally and theoretically.
View Article and Find Full Text PDFMicroorganisms
October 2021
Institute of Cytology, Russian Academy of Sciences, Tikhoretsky av. 4, 194064 St Petersburg, Russia.
Phys Rev Lett
October 2021
Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
The branching fraction of the rare B_{s}^{0}→ϕμ^{+}μ^{-} decay is measured using data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 6 fb^{-1}, respectively. The branching fraction is reported in intervals of q^{2}, the square of the dimuon invariant mass. In the q^{2} region between 1.
View Article and Find Full Text PDFPhys Rev Lett
September 2021
University of Wisconsin - Madison, Madison, WI, Wisconsin, USA.
The first measurement of the dependence of γγ→μ^{+}μ^{-} production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions at sqrt[s_{NN}]=5.02 TeV, with an integrated luminosity of approximately 1.
View Article and Find Full Text PDFPhys Rev Lett
September 2021
Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
A measurement of mixing and CP violation in neutral charm mesons is performed using data reconstructed in proton-proton collisions collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb^{-1}. A total of 30.
View Article and Find Full Text PDFMicrobiol Resour Announc
September 2021
National Research Center "Kurchatov Institute," Moscow, Russia.
sp. strain Az07 was isolated from a brackish canal. The organism is more halotolerant than previously described species of the genus .
View Article and Find Full Text PDFPhys Rev Lett
September 2021
University of Wisconsin-Madison, Madison, Wisconsin, USA.
The CMS experiment at the LHC has measured the differential cross sections of Z bosons decaying to pairs of leptons, as functions of transverse momentum and rapidity, in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The measured Z boson elliptic azimuthal anisotropy coefficient is compatible with zero, showing that Z bosons do not experience significant final-state interactions in the medium produced in the collision.
View Article and Find Full Text PDFSci Rep
September 2021
Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
The GroEL-GroES chaperonin complex is a bacterial protein folding system, functioning in an ATP-dependent manner. Upon ATP binding and hydrolysis, it undergoes multiple stages linked to substrate protein binding, folding and release. Structural methods helped to reveal several conformational states and provide more information about the chaperonin functional cycle.
View Article and Find Full Text PDFPhys Rev Lett
August 2021
Università di Brescia and Sezione INFN, Brescia, Italy.
The event-by-event correlations between three flow amplitudes are measured for the first time in Pb-Pb collisions, using higher-order symmetric cumulants. We find that different three-harmonic correlations develop during the collective evolution of the medium when compared to correlations that exist in the initial state. These new results cannot be interpreted in terms of previous lower-order flow measurements since contributions from two-harmonic correlations are explicitly removed in the new observables.
View Article and Find Full Text PDFPhys Rev Lett
August 2021
Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany.
We report on the first measurement of charm-strange meson D_{s}^{±} production at midrapidity in Au+Au collisions at sqrt[s_{NN}]=200 GeV from the STAR experiment. The yield ratio between strange (D_{s}^{±}) and nonstrange (D^{0}) open-charm mesons is presented and compared to model calculations. A significant enhancement, relative to a pythia simulation of p+p collisions, is observed in the D_{s}^{±}/D^{0} yield ratio in Au+Au collisions over a large range of collision centralities.
View Article and Find Full Text PDFInt J Mol Sci
September 2021
Petersburg Nuclear Physics Institute, NRC "Kurchatov Institute", 188300 Gatchina, Russia.
The growth of the polypeptide chain occurs due to the fast and coordinated work of the ribosome and protein elongation factors, EF-Tu and EF-G. However, the exact contribution of each of these components in the overall balance of translation kinetics remains not fully understood. We created an in vitro translation system replacing either elongation factor with heterologous thermophilic protein from .
View Article and Find Full Text PDFPhys Rev Lett
August 2021
Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
The first observation of exotic states with a new quark content cc[over ¯]us[over ¯] decaying to the J/ψK^{+} final state is reported with high significance from an amplitude analysis of the B^{+}→J/ψϕK^{+} decay. The analysis is carried out using proton-proton collision data corresponding to a total integrated luminosity of 9 fb^{-1} collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The most significant state, Z_{cs}(4000)^{+}, has a mass of 4003±6_{-14}^{+4} MeV, a width of 131±15±26 MeV, and spin parity J^{P}=1^{+}, where the quoted uncertainties are statistical and systematic, respectively.
View Article and Find Full Text PDFPhys Rev Lett
August 2021
Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany.
The cyclotron frequency ratio of ^{187}Os^{29+} to ^{187}Re^{29+} ions was measured with the Penning-trap mass spectrometer PENTATRAP. The achieved result of R=1.000 000 013 882(5) is to date the most precise such measurement performed on ions.
View Article and Find Full Text PDFMolecules
August 2021
Department of Physical Chemistry, A.M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya 18, 420008 Kazan, Russia.
Experimental and theoretical conformational analysis of -methyl--[2-(diphenylphosphoryl)ethyl]diphenylphosphorylacetamide, -butyl--[2-(diphenylphosphoryl)ethyl]diphenylphosphorylacetamide, and -octyl--[2-(diphenylphosphoryl)ethyl]diphenylphosphorylacetamide was carried out by the methods of dipole moments, IR spectroscopy, and Density Functional Theory (DFT) B3PW91/6-311++G(df,p) calculations. In solution, these ,-dialkyl substituted bisphosphorylated acetamides exist as a conformational equilibrium of several forms divided into two groups-with - or -configuration of the carbonyl group and alkyl substituent, and or arrangement of the phosphoryl-containing fragments relative to the amide plane. The substituents at the phosphorus atoms have eclipsed - or staggered -orientation relative to the P=O groups, and orientation of the substituents is due to the presence of intramolecular H-contacts P=O.
View Article and Find Full Text PDFBiochem Mosc Suppl B Biomed Chem
August 2021
St-Petersburg Nuclear Physics Institute (PNPI) NRC Kurchatov Institute, Orlova Roshcha 1, 188300 Gatchina, Leningrad oblast Russia.
Haptoglobin (Hp) is a glycoprotein that binds free hemoglobin (Hb) in plasma and plays a critical role in tissue protection and prevention of oxidative damage. Besides, it has some regulatory functions. Haptoglobin is an acute-phase protein, its concentration in plasma changes in pathology, and the test for its concentration is part of normal clinical practice.
View Article and Find Full Text PDFPhys Rev Lett
July 2021
Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany.
The Breit-Wheeler process which produces matter and antimatter from photon collisions is experimentally investigated through the observation of 6085 exclusive electron-positron pairs in ultraperipheral Au+Au collisions at sqrt[s_{NN}]=200 GeV. The measurements reveal a large fourth-order angular modulation of cos4Δϕ=(16.8±2.
View Article and Find Full Text PDFMicrobiol Resour Announc
August 2021
National Research Center Kurchatov Institute, Moscow, Russia.
Acinetobacter pittii strain VKPM B-3780 is a prospective degrader of oil and methanol, isolated from industrial wastewater. Here, we present the draft genome sequence of strain VKPM B-3780, obtained using Illumina sequencing of the fragment genomic library.
View Article and Find Full Text PDFInt J Mol Sci
July 2021
Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of NRC «Kurchatov Institute», 188300 Gatchina, Russia.
Various neurodegenerative disorders are associated with human NTE/PNPLA6 dysfunction. Mechanisms of neuropathogenesis in these diseases are far from clearly elucidated. Hereditary spastic paraplegia belongs to a type of neurodegeneration associated with NTE/PNLPLA6 and is implicated in neuron death.
View Article and Find Full Text PDFPhys Rev Lett
July 2021
Università di Brescia, Brescia, Italy.
A measurement of dielectron production in proton-proton (pp) collisions at sqrt[s]=13 TeV, recorded with the ALICE detector at the CERN LHC, is presented in this Letter. The data set was recorded with a reduced magnetic solenoid field. This enables the investigation of a kinematic domain at low dielectron (ee) invariant mass m_{ee} and pair transverse momentum p_{T,ee} that was previously inaccessible at the LHC.
View Article and Find Full Text PDFPhys Rev Lett
July 2021
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100971, China.
Isotope shifts of ^{223-226,228}Ra^{19}F were measured for different vibrational levels in the electronic transition A^{2}Π_{1/2}←X^{2}Σ^{+}. The observed isotope shifts demonstrate the particularly high sensitivity of radium monofluoride to nuclear size effects, offering a stringent test of models describing the electronic density within the radium nucleus. Ab initio quantum chemical calculations are in excellent agreement with experimental observations.
View Article and Find Full Text PDFMicrobiol Resour Announc
July 2021
National Research Center "Kurchatov Institute," Moscow, Russia.
The draft genome sequence of Rhodococcus erythropolis VKPM Ac-1659, a putative oil-degrading strain, is reported. This genome sequence may provide better insights into the diversity and evolution of the genes responsible for hydrocarbon degradation in soil microorganisms.
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