Персона:
Парфенов, Петр Евгеньевич

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Научная группа

Организационные подразделения

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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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Парфенов

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Петр Евгеньевич

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Теперь показываю 1 - 10 из 75

Только метаданные
Measurement of flow coefficients in high-multiplicity p+Au, d+Au, and He 3 + Au collisions at sNN =200 GeV
(2024) Abdulhamid,M.I.; Aboona, B. E.; Adam, J.; Adams, J. R.; Alekseev, I.; Alpatov, E.; Brandin, A. V.; Kochenda, L.; Kraeva, A. Yu.; Kravtsov, P.; Okorokov, V. A.; Parfenov, P.; Povarov, A.; Strikhanov, M.; Taranenko, A.; Vasiliev, A. N.; Алексеев, Игорь Геннадьевич; Алпатов, Егор Вячеславович; Брандин, Андрей Владимирович; Краева, Анна Юрьевна; Окороков, Виталий Алексеевич; Парфенов, Петр Евгеньевич; Поваров, Алексей Сергеевич; Стриханов, Михаил Николаевич; Тараненко, Аркадий Владимирович; Васильев, Александр Николаевич
Только метаданные
Elliptic Flow Fluctuations at NICA Energy Range
(2024) Demanov, A.; Parfenov, P.; Taranenko, A.; Деманов, Александр Евгеньевич; Парфенов, Петр Евгеньевич; Тараненко, Аркадий Владимирович
Только метаданные
Scaling Properties of Anisotropic Flow at Nuclotron-NICA Energies
(2023) Parfenov, P.; Troshin, I. Yu.; Taranenko, A.; Парфенов, Петр Евгеньевич; Трошин, Иван Юрьевич; Тараненко, Аркадий Владимирович
Только метаданные
Measurements of the Elliptic and Triangular Azimuthal Anisotropies in Central He+Au, 4+Au and p+Au Collisions at & RADIC;SNN=200 GeV br
(2023) Alekseev I.; Brandin A. V.; Kochenda L.; Kravtsov P.; Nigmatkulov G.; Okorokov V. A.; Parfenov P.; Strikhanov M.; Taranenko A.; Vasiliev A. N.; Алексеев, Игорь Геннадьевич; Брандин, Андрей Владимирович; Нигматкулов, Григорий Александрович; Окороков, Виталий Алексеевич; Парфенов, Петр Евгеньевич; Стриханов, Михаил Николаевич; Тараненко, Аркадий Владимирович; Васильев, Александр Николаевич
The elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients in central 3He thorn Au, d thorn Au, and p thorn Au collisions atffiffiffiffiffiffiffi p 1/4 200 GeV are measured as a function of transverse momentum (pT) at sNN midrapidity (j and eta;j < 0.9), via the azimuthal angular correlation between two particles both at j and eta;j < 0.9. While the v2opT thorn values depend on the colliding systems, the v3 opT thorn values are system independent within the uncertainties, suggesting an influence on eccentricity from subnucleonic fluctuations in these small -sized systems. These results also provide stringent constraints for the hydrodynamic modeling of these systems.
Только метаданные
Centrality determination in heavy-Ion collisions with MPD detector at NICA
(2021) Parfenov, P.; Segal, I.; Idrisov, D.; Luong, V. B.; Taranenko, A.; Demanov, A.; Truttse, A.; Volodikhin, E.; Парфенов, Петр Евгеньевич; Сегаль, Илья Вадимович; Идрисов, Дим Маратович; Тараненко, Аркадий Владимирович; Деманов, Александр Евгеньевич; Трутце, Антон Андреевич; Володихин, Евгений Андреевич
© 2021 Jagellonian University. All rights reserved.Centrality is a key parameter for defining the collision system size in relativistic heavy-ion collisions. The centrality determination provides a tool for comparing the anticipated measurements with Multi-Purpose Detector (MPD) at NICA with those of other experiments and with theoretical calculations. The performance for collision centrality determination in MPD experiment using the multiplicity of produced particles is presented.
Только метаданные
Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au plus Au Collisions at root S-NN=200 GeV
(2022) Abdallah, M. S.; Adam, J.; Adamczyk, L.; Adams, J. R.; Alekseev, I.; Brandin, A. V.; Khyzhniak, Y. V.; Kochenda, L.; Kravtsov, P.; Nigmatkulov, G.; Okorokov, V. A.; Parfenov, P.; Strikhanov, M.; Taranenko, A.; Алексеев, Игорь Геннадьевич; Брандин, Андрей Владимирович; Нигматкулов, Григорий Александрович; Окороков, Виталий Алексеевич; Парфенов, Петр Евгеньевич; Стриханов, Михаил Николаевич; Тараненко, Аркадий Владимирович
The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have different sensitivities to the spectator and participant planes, and could thus be determined by measurements with respect to these planes. We report such measurements in Au + Au collisions at a nucleon-nucleon center-of-mass energy of 200 GeV at the Relativistic Heavy-Ion Collider. It is found that the charge separation, with the flow background removed, is consistent with zero in peripheral (large impact parameter) collisions. Some indication of finite CME signals is seen in midcentral (intermediate impact parameter) collisions. Significant residual background effects may, however, still be present.
Только метаданные
Measurement of cold nuclear matter effects for inclusive J/ψ in p+Au collisions at sNN=200 GeV
(2022) Abdallah, M. S.; Aboona, B. E.; Adam, J.; Adamczyk, L.; Alekseev, I.; Brandin, A. V.; Khyzhniak, Y. V.; Kochenda, L.; Kravtsov, P.; Nigmatkulov, G.; Okorokov, V. A.; Parfenov, P.; Strikhanov, M.; Taranenko, A.; Алексеев, Игорь Геннадьевич; Брандин, Андрей Владимирович; Нигматкулов, Григорий Александрович; Окороков, Виталий Алексеевич; Парфенов, Петр Евгеньевич; Стриханов, Михаил Николаевич; Тараненко, Аркадий Владимирович
© 2022 The Author(s)Measurement by the STAR experiment at RHIC of the cold nuclear matter (CNM) effects experienced by inclusive J/ψ at mid-rapidity in 0-100% p+Au collisions at sNN = 200 GeV is presented. Such effects are quantified utilizing the nuclear modification factor, RpAu, obtained by taking a ratio of J/ψ yield in p+Au collisions to that in p+p collisions scaled by the number of binary nucleon-nucleon collisions. The differential J/ψ yield in both p+p and p+Au collisions is measured through the dimuon decay channel, taking advantage of the trigger capability provided by the Muon Telescope Detector in the RHIC 2015 run. Consequently, the J/ψ RpAu is derived within the transverse momentum (pT) range of 0 to 10 GeV/c. A suppression of approximately 30% is observed for pT<2 GeV/c, while J/ψ RpAu becomes compatible with unity for pT greater than 3 GeV/c, indicating the J/ψ yield is minimally affected by the CNM effects at high pT. Comparison to a similar measurement from 0-20% central Au+Au collisions reveals that the observed strong J/ψ suppression above 3 GeV/c is mostly due to the hot medium effects, providing strong evidence for the formation of the quark-gluon plasma in these collisions. Several model calculations show qualitative agreement with the measured J/ψ RpAu, while their agreement with the J/ψ yields in p+p and p+Au collisions is worse.
Только метаданные
Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity Distributions in Au plus Au Collisions at root S-NN=27, 54.4, and 200 GeV at RHIC
(2021) Abdallah, M. S.; Adam, J.; Adamczyk, L.; Adams, J. R.; Alekseev, I.; Brandin, A. V.; Khyzhniak, Y. V.; Kochenda, L.; Kravtsov, P.; Nigmatkulov, G.; Okorokov, V. A.; Parfenov, P.; Strikhanov, M.; Taranenko, A.; Алексеев, Игорь Геннадьевич; Брандин, Андрей Владимирович; Нигматкулов, Григорий Александрович; Окороков, Виталий Алексеевич; Парфенов, Петр Евгеньевич; Стриханов, Михаил Николаевич; Тараненко, Аркадий Владимирович
According to first-principle lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region mu(B) <= T-c. In this range the ratio, C-6/C-2, of net-baryon distributions are predicted to be negative. In this Letter, we report the first measurement of the midrapidity net-proton C-6/C-2 from 27, 54.4, and 200 GeV Au + Au collisions at the Relativistic Heavy Ion Collider (RHIC). The dependence on collision centrality and kinematic acceptance in (p(T) , y) are analyzed. While for 27 and 54.4 GeV collisions the C-6/C-2 values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the C-6/C-2 ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high-energy nuclear collisions at top RHIC energy.
Только метаданные
Cumulants and correlation functions of net-proton, proton, and antiproton multiplicity distributions in Au plus Au collisions at energies available at the BNL Relativistic Heavy Ion Collider
(2021) Abdallah, M. S.; Adam, J.; Adamczyk, L.; Adams, J. R.; Alekseev, I.; Brandin, A. V.; Khyzhniak, Y. V.; Kochenda, L.; Kravtsov, P.; Nigmatkulov, G.; Okorokov, V. A.; Parfenov, P.; Strikhanov, M.; Taranenko, A.; Алексеев, Игорь Геннадьевич; Брандин, Андрей Владимирович; Нигматкулов, Григорий Александрович; Окороков, Виталий Алексеевич; Парфенов, Петр Евгеньевич; Стриханов, Михаил Николаевич; Тараненко, Аркадий Владимирович
We report a systematic measurement of cumulants, C-n, for net-proton, proton, and antiproton multiplicity distributions, and correlation functions, kappa(n), for proton and antiproton multiplicity distributions up to the fourth order in Au+Au collisions at root s(NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 62.4, and 200 GeV. The C-n and kappa(n) are presented as a function of collision energy, centrality and kinematic acceptance in rapidity, y, and transverse momentum, pT. The data were taken during the first phase of the Beam Energy Scan (BES) program (2010-2017) at the BNL Relativistic Heavy Ion Collider (RHIC) facility. The measurements are carried out at midrapidity (vertical bar y vertical bar < 0.5) and transverse momentum 0.4 < p(T) < 2.0 GeV/c, using the STAR detector at RHIC. We observe a nonmonotonic energy dependence (root s(NN) = 7.7-62.4 GeV) of the net-proton C-4/C-2 with the significance of 3.1 sigma for the 0-5% central Au+Au collisions. This is consistent with the expectations of critical fluctuations in a QCD-inspired model. Thermal and transport model calculations show a monotonic variation with root s(NN). For the multiparticle correlation functions, we observe significant negative values for a two-particle correlation function, kappa(2), of protons and antiprotons, which are mainly due to the effects of baryon number conservation. Furthermore, it is found that the four-particle correlation function, kappa(4), of protons plays a role in determining the energy dependence of proton C-4/C-1 below 19.6 GeV, which cannot be understood by the effect of baryon number conservation.
Только метаданные
Scaling Properties of Anisotropic Flow at Nuclotron-NICA Energies
(2023) Parfenov, P.; Taranenko, A.; Парфенов, Петр Евгеньевич; Тараненко, Аркадий Владимирович