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Кондратьева, Наталья Викторовна

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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Кондратьева

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Наталья Викторовна

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Теперь показываю 1 - 10 из 196

Только метаданные
Measurement of prompt D0, D+, D*+, and DS+ production in p–Pb collisions at √sNN = 5.02 TeV
(2019) Acharya, S.; Adamova, D.; Adhya, S. P.; Adler, A.; Belyaev, V.; Bogdanov, A.; Bolozdynya, A.; Borissov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Болоздыня, Александр Иванович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
© 2019, The Author(s).The measurement of the production of prompt D0, D+, D*+, and DS+ mesons in proton–lead (p–Pb) collisions at the centre-of-mass energy per nucleon pair of sNN = 5.02 TeV, with an integrated luminosity of 292 ± 11 μb−1, are reported. Differential production cross sections are measured at mid-rapidity (−0.96 < ycms< 0.04) as a function of transverse momentum (pT) in the intervals 0 < pT< 36 GeV/c for D0, 1 < pT< 36 GeV/c for D+ and D*+, and 2 < pT< 24 GeV/c for D+ mesons. For each species, the nuclear modification factor RpPb is calculated as a function of pT using a proton-proton (pp) ref- erence measured at the same collision energy. The results are compatible with unity in the whole pT range. The average of the non-strange D mesons RpPb is compared with theoretical model predictions that include initial-state effects and parton transport model predictions. The pT dependence of the D0, D+, and D*+ nuclear modification factors is also reported in the interval 1 < pT< 36 GeV/c as a function of the collision centrality, and the central-to-peripheral ratios are computed from the D-meson yields measured in different centrality classes. The results are further compared with charged-particle measurements and a similar trend is observed in all the centrality classes. The ratios of the pT-differential cross sections of D0, D+, D*+, and DS+ mesons are also reported. The DS+ and D+ yields are compared as a function of the charged-particle multiplicity for several pT intervals. No modification in the relative abundances of the four species is observed with respect to pp collisions within the statistical and systematic uncertainties. [Figure not available: see fulltext.].
Только метаданные
Spin alignment measurements using vector mesons with ALICE detector at the LHC
(2019) Singh, R.; Acharya, S.; Acosta, F. T.; Adamova, D.; Belyaev, V.; Bogdanov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
We present new measurements related to spin alignment of K*(0) vector mesons at mid-rapidity for Pb-Pb collisions at root s(NN) = 2.76 and 5.02 TeV. The spin alignment measurements are carried out with respect to production plane and 2nd order event plane. At low p(T) the spin density matrix element rho(00) for K*(0) is found to have values slightly below 1/3, while it is consistent with 1/3, i.e. no spin alignment, at high p(T). Similar values of rho(00) are observed with respect to both production plane and event plane. Within statistical and systematic uncertainties, rho(00) values are also found to be independent of root s(NN). rho(00) also shows centrality dependence with maximum deviation from 1/3 for mid-central collisions with respect to both the kinematic planes. The measurements for K*(0) in pp collisions at root s = 13 TeV and for K-s(0) (a spin 0 hadron) in 20-40% central Pb-Pb collisions at root s(NN) = 2.76 TeV are consistent with no spin alignment.
Только метаданные
ALICE results on system-size dependence of charged-particle multiplicity density in p-Pb, Pb-Pb and Xe-Xe collisions
(2019) Kim, B.; Acharya, S.; Acosta, F. T.; Adamova, D.; Belyaev, V.; Bogdanov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
Particle production at LHC energies involves the interplay of hard (perturbative) and soft (non-perturbative) QCD processes. Global observables, such as the charged-particle multiplicity, are related to the initial geometry and the energy density produced in the collision. They are important to characterise relativistic heavy-ion collisions and to constrain model calculations. The LHC produced Xenon-Xenon collisions for the first time in October 2017. New results on the primary charged-particle pseudorapidity density, and its pseudorapidity and centrality dependence are presented for this lighter and deformed nucleus, and compared to measurements obtained for lead ions. New results will also be presented for p-Pb collisions at the highest energy of 8.16 TeV, as part of an overview of all the measurements at LHC Run 1 and 2 energies. These studies allow us to investigate the evolution of particle production with energy and system size and to compare models based on various particle production mechanisms and different initial conditions.
Только метаданные
Heavy-flavour hadron decay leptons in Pb-Pb and Xe-Xe collisions at the LHC with ALICE
(2019) Dubla, A.; Acharya, S.; Acosta, F. T.; Adamova, D.; Belyaev, V.; Bogdanov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
Heavy quarks, i.e. charm and beauty, are sensitive probes of the medium produced in high-energy heavy-ion collisions. They are produced in the early stage of the collision, mainly in hard partonic scattering processes, and are expected to experience the whole collision evolution interacting with the medium constituents via both elastic and inelastic processes. The nuclear modification factor (R-AA) is one of the main experimental observables that allow us to investigate the interaction strength of heavy quarks with the medium. The ALICE collaboration measured the production of open heavy-flavour hadrons via their semi-leptonic decays to electrons at mid-rapidity and to moons at forward rapidity in elementary proton-proton (pp) collisions as well as p-Pb, Ph-Ph and in Xe-Xe collisions.
Только метаданные
ϒ production in p–Pb collisions at sNN=8.16 TeV
(2020) Acharya, S.; Adamova, D.; Adler, A.; Adolfsson, J.; Belyaev, V.; Bogdanov, A.; Bolozdynya, A.; Borissov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Болоздыня, Александр Иванович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
© 2020 European Organization for Nuclear Researchϒ production in p–Pb interactions is studied at the centre-of-mass energy per nucleon–nucleon collision sNN=8.16 TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances via their dimuon decay channel, in the centre-of-mass rapidity intervals 2.03
Только метаданные
Measurement of the (anti-)3He elliptic flow in Pb–Pb collisions at sNN=5.02TeV
(2020) Acharya, S.; Adamova, D.; Adhya, S. P.; Adler, A.; Belyaev, V.; Bogdanov, A.; Bolozdynya, A.; Borissov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Болоздыня, Александр Иванович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
© 2020 European Organization for Nuclear ResearchThe elliptic flow (v2) of (anti-)3He is measured in Pb–Pb collisions at sNN=5.02TeV in the transverse-momentum (pT) range of 2–6 GeV/c for the centrality classes 0–20%, 20–40%, and 40–60% using the event-plane method. This measurement is compared to that of pions, kaons, and protons at the same center-of-mass energy. A clear mass ordering is observed at low pT, as expected from relativistic hydrodynamics. The violation of the scaling of v2 with the number of constituent quarks at low pT, already observed for identified hadrons and deuterons at LHC energies, is confirmed also for (anti-)3He. The elliptic flow of (anti-)3He is underestimated by the Blast-Wave model and overestimated by a simple coalescence approach based on nucleon scaling. The elliptic flow of (anti-)3He measured in the centrality classes 0–20% and 20–40% is well described by a more sophisticated coalescence model where the phase-space distributions of protons and neutrons are generated using the iEBE-VISHNU hybrid model with AMPT initial conditions.
Только метаданные
Production of (anti-)He-3 and (anti-)H-3 in p-Pb collisions at root s(NN)=5.02 TeV
(2020) Acharya, S.; Adamova, D.; Adler, A.; Adolfsson, J.; Belyaev, V.; Bogdanov, A.; Bolozdynya, A.; Borissov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Болоздыня, Александр Иванович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
The transverse momentum (p(T)) differential yields of (anti-)He-3 and (anti-)H-3 measured in p-Pb collisions at root s(NN) = 5.02 TeV with ALICE at the Large Hadron Collider (LHC) are presented. The ratios of the p(T)-integrated yields of (anti-)He-3 and (anti-)H-3 to the proton yields are reported, as well as the pT dependence of the coalescence parameters B-3 for (anti-)He-3 and (anti-)H-3. For (anti-)He-3, the results obtained in four classes of the mean charged-particle multiplicity density are also discussed. These results are compared to predictions from a canonical statistical hadronization model and coalescence approaches. An upper limit on the total yield of (4)(He) over bar is determined.
Только метаданные
Higher harmonic non-linear flow modes of charged hadrons in Pb-Pb collisions at √sNN = 5.02 TeV
(2020) Acharya, S.; Adamova, D.; Adler, A.; Adolfsson, J.; Belyaev, V.; Bogdanov, A.; Bolozdynya, A.; Borissov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Болоздыня, Александр Иванович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
© 2020, The Author(s).Anisotropic flow coefficients, vn, non-linear flow mode coefficients, χn,mk, and correlations among different symmetry planes, ρn,mk are measured in Pb-Pb collisions at sNN = 5.02 TeV. Results obtained with multi-particle correlations are reported for the transverse momentum interval 0.2 < pT< 5.0 GeV/c within the pseudorapidity interval 0.4 < |η| < 0.8 as a function of collision centrality. The vn coefficients and χn,mk and ρn,mk are presented up to the ninth and seventh harmonic order, respectively. Calculations suggest that the correlations measured in different symmetry planes and the non-linear flow mode coefficients are dependent on the shear and bulk viscosity to entropy ratios of the medium created in heavy-ion collisions. The comparison between these measurements and those at lower energies and calculations from hydrodynamic models places strong constraints on the initial conditions and transport properties of the system. [Figure not available: see fulltext.].
Только метаданные
Measurements of inclusive jet spectra in pp and central Pb-Pb collisions at root S-NN=5.02 TeV
(2020) Acharya, S.; Adamova, D.; Adler, A.; Adolfsson, J.; Belyaev, V.; Bogdanov, A.; Bolozdynya, A.; Borissov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Болоздыня, Александр Иванович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
This article reports measurements of the p(T)-differential inclusive jet cross section in pp collisions at root S = 5.02 TeV and the p(T)-differential inclusive jet yield in Pb-Pb 0-10% central collisions at root S-NN = 5.02 TeV. Jets were reconstructed at midrapidity with the ALICE tracking detectors and electromagnetic calorimeter using the anti-k(T) algorithm. For pp collisions, we report jet cross sections for jet resolution parameters R = 0.1-0.6 over the range 20 < p(T,jet) < 140 GeV/c, as well as the jet cross-section ratios of different R and comparisons to two next-to-leading-order (NLO)-based theoretical predictions. For Pb-Pb collisions, we report the R = 0.2 and R = 0.4 jet spectra for 40 < p(T,jet) < 140 GeV/c and 60 < p(T,jet) < 140 GeV/c, respectively. The scaled ratio of jet yields observed in Pb-Pb to pp collisions, R-AA, is constructed, and exhibits strong jet quenching and a clear p(T) dependence for R = 0.2. No significant R dependence of the jet R-AA is observed within the uncertainties of the measurement. These results are compared to several theoretical predictions.
Только метаданные
Multiplicity dependence of light (anti-)nuclei production in p–Pb collisions at sNN=5.02 TeV
(2020) Acharya, S.; Adamova, D.; Adhya, S. P.; Adler, A.; Belyaev, V.; Bogdanov, A.; Bolozdynya, A.; Borissov, A.; Grigoriev, V.; Kaplin, V.; Kondratyeva, N.; Loginov, V.; Melikyan, Y.; Samsonov, V.; Selyuzhenkov, I.; Беляев, Владимир Никитич; Богданов, Алексей Александрович; Болоздыня, Александр Иванович; Григорьев, Владислав Анатольевич; Кондратьева, Наталья Викторовна; Логинов, Виталий Александрович
© 2019The measurement of the deuteron and anti-deuteron production in the rapidity range −1