Search Results - "Samoylenko, V D"
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First constraints on the Lμ− Lτ explanation of the muon g-2 anomaly from NA64-e at CERN
Published in The journal of high energy physics (23-07-2024)“…A bstract The inclusion of an additional U(1) gauge L μ − L τ symmetry would release the tension between the measured and the predicted value of the anomalous…”
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Observation of K+→π+π0π0γ decay
Published in The European physical journal. C, Particles and fields (01-04-2024)“…The K + → π + π 0 π 0 γ decay is observed by the OKA collaboration. About 60 events of the decay observed with signal:noise ≈ 1 . The branching ratio obtained…”
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Searches for the light invisible axion-like particle in K+→π+π0a decay
Published in The European physical journal. C, Particles and fields (13-03-2024)“…A high-statistics data sample of the K + decays is recorded by the OKA collaboration. A missing mass analysis is performed to search for a light invisible…”
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On the Possibility of Observing Tetraquarks in the Beam
Published in Moscow University physics bulletin (2023)“…Various models of tetraquark generation in the reaction are considered. The predictions for corresponding inclusive spectra were evaluated at the energies 32…”
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5
A method of providing the integrity of information in the group of robotic engineering complexes based on crypt-code constructions
Published in Automatic control and computer sciences (2017)“…The system of cryptographic code transformation of information based on the aggregated application of block encryption algorithms and polynomial codes of the…”
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6
Studying the timing characteristics of counters for the trigger hodoscope of charged particles for the NA62 experiment
Published in Instruments and experimental techniques (New York) (2015)“…The time resolution of the prototype counters for a new charged particle hodoscope for the NA62 experiment has been measured. The prototype scintillation…”
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Study of the $\pi^{0}\pi^{0}$-system with the GAMS-4000 spectrometer at 100 GeV/c
Published in The European physical journal. A, Hadrons and nuclei (01-12-1998)Get full text
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Search for a New B-L Z' Gauge Boson with the NA64 Experiment at CERN
Published 22-10-2022“…Phys.Rev.Lett. 129, 161801 (2022) A search for a new $Z'$ gauge boson associated with (un)broken B-L symmetry in the keV-GeV mass range is carried out for the…”
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First operation of the PWO crystal calorimeter as a mass spectrometer in a heavy-load high energy physics experiment
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-03-1997)“…The lead tungstate (PWO) heavy crystal calorimeter is tested in a GAMS-type experiment detecting 50 000 π 0-mesons produced in a 32.5 GeV/ c intensive π − beam…”
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On the Possibility of Observing Tetraquarks in the $$\boldsymbol{K^{+}}$$ Beam
Published in Moscow University physics bulletin (01-12-2023)Get full text
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Constraints on New Physics in the Electron g-2 from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector
Published 03-02-2021“…Phys. Rev. Lett. 126, 211802 (2021) We performed a search for a new generic $X$ boson, which could be a scalar ($S$), pseudoscalar ($P$), vector ($V$) or an…”
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A measurement of the branching fractions of the $f_{1}(1285)$ and $f_{1}(1420)$ produced central pp interactions at 450 GeV/c
Published in Physics letters. B (12-11-1998)Get full text
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Observation of $$K^{+} \rightarrow \pi ^{+}\pi ^{0}\pi ^{0}\gamma $$ decay
Published in The European physical journal. C, Particles and fields (02-04-2024)“…Abstract The $$K^{+} \rightarrow \pi ^{+}\pi ^{0}\pi ^{0}\gamma $$ K + → π + π 0 π 0 γ decay is observed by the OKA collaboration. About 60 events of the decay…”
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14
Searches for the light invisible axion-like particle in $$K^{+} \rightarrow \pi ^{+}\pi ^{0} a$$ decay
Published in The European physical journal. C, Particles and fields (13-03-2024)“…Abstract A high-statistics data sample of the $$K^{+}$$ K + decays is recorded by the OKA collaboration. A missing mass analysis is performed to search for a…”
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15
Search for Axionlike and Scalar Particles with the NA64 Experiment
Published 02-08-2020“…Phys. Rev. Lett. 125, 081801 (2020) We carried out a model-independent search for light scalar (s) and pseudoscalar axionlike (a) particles that couple to two…”
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The Upper Limit on the K+ → π0π0π0e+ν Decay
Published in JETP letters (11-10-2024)Get full text
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Spin density matrix elements in exclusive ρ0 meson muoproduction
Published in The European physical journal. C, Particles and fields (13-10-2023)“…We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive ρ 0 meson muoproduction at COMPASS using 160 GeV/ c polarised μ + and μ -…”
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Dark matter search in missing energy events with NA64
Published 20-09-2019“…Phys. Rev. Lett. 123, 121801 (2019) A search for sub-GeV dark matter production mediated by a new vector boson $A'$, called dark photon, is performed by the…”
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Characterisation of the dip-bump structure observed in proton–proton elastic scattering at $$\sqrt{s}$$ s = 8 TeV
Published in The European physical journal. C, Particles and fields (01-03-2022)“…Abstract The TOTEM collaboration at the CERN LHC has measured the differential cross-section of elastic proton–proton scattering at $$\sqrt{s} =…”
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Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN
Published 09-06-2018“…Phys. Rev. Lett. 120, 231802 (2018) We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of…”
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