Персона:
Рябов, Виктор Германович

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Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.

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Рябов

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Виктор Германович

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Теперь показываю 1 - 10 из 76

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Low- pT direct-photon production in Au+Au collisions at sNN =39 and 62.4 GeV
(2023) Abdulameer, N. J.; Acharya, U.; Adare, A.; Aidala, C.; Blau, D. S.; Riabov, V.; Samsonov, V.; Taranenko, A.; Блау, Дмитрий Сергеевич; Рябов, Виктор Германович; Тараненко, Аркадий Владимирович
Только метаданные
Prospects for Photon Conversion Measurements in the Future MPD Experiment at NICA
(2023) Kryshen, E.; Burmasov, N.; Ivanishchev, D.; Kotov, D.; Riabov, V.; Рябов, Виктор Германович
Только метаданные
Nonprompt direct-photon production in Au+Au collisions at sNN =200 GeV
(2024) Abdulameer, N. J.; Acharya, U.; Adare, A.; Aidala, C.; Blau, D. S.; Riabov, V.; Samsonov, V.; Taranenko, A.; Блау, Дмитрий Сергеевич; Рябов, Виктор Германович; Тараненко, Аркадий Владимирович
Только метаданные
Nuclear-modification factor of charged hadrons at forward and backward rapidity in p plus Al and p plus Au collisions at root S-NN=200 GeV
(2020) Aidala, C.; Akiba, Y.; Alfred, M.; Andrieux, V.; Blau, D. S.; Riabov, V.; Samsonov, V.; Taranenko, A.; Блау, Дмитрий Сергеевич; Рябов, Виктор Германович; Тараненко, Аркадий Владимирович
The PHENIX experiment has studied nuclear effects in p + Al and p + Au collisions at root S-NN = 200GeV on charged hadron production at forward rapidity (1.4 < eta < 2.4, p-going direction) and backward rapidity (-2.2 < eta < -1.2, A-going direction). Such effects are quantified by measuring nuclear modification factors as a function of transverse momentum and pseudorapidity in various collision multiplicity selections. In central p + Al and p + Au collisions, a suppression (enhancement) is observed at forward (backward) rapidity compared to the binary scaled yields in p + p collisions. The magnitude of enhancement at backward rapidity is larger in p + Au collisions than in p + Al collisions, which have a smaller number of participating nucleons. However, the results at forward rapidity show a similar suppression within uncertainties. The results in the integrated centrality are compared with calculations using nuclear parton distribution functions, which show a reasonable agreement at the forward rapidity but fail to describe the backward rapidity enhancement.
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Feasibility of thermal photon measurements in heavy ion collisions at NICA energies
(2020) Ivanishchev, D.; Kryshen, E.; Kotov, D.; Malaev, M.; Riabov, V.; Рябов, Виктор Германович
© 2020 Institute of Physics Publishing. All rights reserved.Thermal photons serve as valuable probes of the hot and dense medium produced in heavy ion collisions. The effective thermal photon temperature measured at RHIC and LHC energies far exceeds the temperature predicted for the phase space transition into the deconfined state of quarks and gluons, known as quark-gluon plasma (QGP). Direct photon measurements in heavy ion collisions at the future NICA collider may help to estimate the effective temperature of the produced medium at lower energies and trace the transition from QGP to the hadron gas state. In this contribution, we present feasibility studies on the thermal photon measurements in AuAu collisions using the photon conversion method in the MPD experiment at NICA.
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Polarization and cross section of midrapidity J /ψ production in p+p collisions at s =510 GeV
(2020) Acharya, U.; Adare, A.; Aidala, C.; Ajitanand, N. N.; Riabov, V.; Samsonov, V.; Taranenko, A.; Рябов, Виктор Германович; Тараненко, Аркадий Владимирович
© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.The PHENIX experiment has measured the spin alignment for inclusive J/ψ→e+e- decays in proton-proton collisions at s=510 GeV at midrapidity. The angular distributions have been measured in three different polarization frames, and the three decay angular coefficients have been extracted in a full two-dimensional analysis. Previously, PHENIX saw large longitudinal net polarization at forward rapidity at the same collision energy. This analysis at midrapidity, complementary to the previous PHENIX results, sees no sizable polarization in the measured transverse momentum range of 0.0
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Status of the MPD Experiment: Towards the First Data Taking
(2025) Riabov, V.; Рябов, Виктор Германович
Только метаданные
PHENIX Collaboration
(2019) Adare, A.; Afanasiev, S.; Aidala, C.; Ajitanand, N. N.; Blau, D.; Riabov, V.; Samsonov, V.; Taranenko, A.; Блау, Дмитрий Сергеевич; Рябов, Виктор Германович; Тараненко, Аркадий Владимирович
Только метаданные
Production and reconstruction of short-lived ρ(770)0, K∗(892)0, φ(1020) and Λ(1520) resonances as a function of centrality and energy in Au+Au collisions at NICA
(2020) Ivanishchev, D.; Kotov, D.; Malaev, M.; Ryabov, Y.; Riabov, V.; Рябов, Виктор Германович
© Published under licence by IOP Publishing Ltd.The short-lived resonances have proved to be very useful in the study of heavy-ion collisions at SPS, RHIC, and the LHC. Properties of these particles measured in dominant hadronic decay channels carry a wealth of information about the hadron chemistry and reaction dynamics. Resonances containing one or two strange quarks contribute to the study of the strangeness enhancement phenomenon predicted as a signature of the phase transition to quark-gluon plasma in heavy-ion collisions. Resonance integrated and differential yields are sensitive to the hadron re-scattering and regeneration in the hadronic phase. The resonance production has only scarcely been studied in heavy-ion collisions at NICA energies. These proceedings are devoted to the review of the expected properties of the resonances and their sensitivity to different stages of Au+Au collisions at √sNN = 11 GeV. Results of feasibility studies for reconstruction of ρ(770)0, K∗(892)0, φ(1020) and Λ(1520) resonances in the MPD experimental setup as a function of collision energy and centrality are presented.
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Creation of quark–gluon plasma droplets with three distinct geometries
(2019) Aidala, C.; Akiba, Y.; Alfred, M.; Andrieux, V.; Blau, D. S.; Riabov, V.; Samsonov, V.; Taranenko, A.; Блау, Дмитрий Сергеевич; Рябов, Виктор Германович; Тараненко, Аркадий Владимирович
© 2018, The Author(s), under exclusive licence to Springer Nature Limited. Experimental studies of the collisions of heavy nuclei at relativistic energies have established the properties of the quark–gluon plasma (QGP), a state of hot, dense nuclear matter in which quarks and gluons are not bound into hadrons1–4. In this state, matter behaves as a nearly inviscid fluid5 that efficiently translates initial spatial anisotropies into correlated momentum anisotropies among the particles produced, creating a common velocity field pattern known as collective flow. In recent years, comparable momentum anisotropies have been measured in small-system proton–proton (p+p) and proton–nucleus (p+A) collisions, despite expectations that the volume and lifetime of the medium produced would be too small to form a QGP. Here we report on the observation of elliptic and triangular flow patterns of charged particles produced in proton–gold (p+Au), deuteron–gold (d+Au) and helium–gold (3He+Au) collisions at a nucleon–nucleon centre-of-mass energy sNN = 200 GeV. The unique combination of three distinct initial geometries and two flow patterns provides unprecedented model discrimination. Hydrodynamical models, which include the formation of a short-lived QGP droplet, provide the best simultaneous description of these measurements.