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Impact of low-x resummation on QCD analysis of HERA data
The European Physical Journal C - Particles and Fields. 2018. Vol. 78. No. 8. P. 1-14.
Shvydkin P., Glazov A., Olness F., Сапронов А. А.
Fits to the final combined HERA deep-inelastic scattering cross-section data within the conventional DGLAP framework of QCD have shown some tension at low x and low Q2. A resolution of this tension incorporating ln(1/x)-resummation terms into the HERAPDF fits is investigated using the xFitter program. The kinematic region where this resummation is important is delineated. Such high-energy resummation not only gives a better description of the data, particularly of the longitudinal structure function FL, it also results in a gluon PDF which is steeply rising at low x for low scales, Q2≃2.5 GeV2, contrary to the fixed-order NLO and NNLO gluon PDF.
Bertone V., Сапронов А. А., Journal of High Energy Physics 2016 Vol. 1608 No. 050 P. 1-38
The charm quark mass is one of the fundamental parameters of the Standard Model Lagrangian. In this work we present a determination of the MSbar charm mass from a fit to the inclusive and charm HERA deep-inelastic structure function data. The analysis is performed within the xFitter framework, with structure functions computed in the FONLL ...
Added: August 7, 2018
Arbuzov A., Bardin D., Bondarenko S. et al., JETP Letters 2016 Vol. 103 No. 2 P. 131-136
This article presents new features of the MCSANC v.1.20 program, a Monte Carlo tool for calculation of the next-to-leading order electroweak and QCD corrections to various Standard Model processes. The extensions concern implementation of Drell--Yan-like processes and include a systematic treatment of the photon-induced contribution in proton--proton collisions and electroweak corrections beyond NLO approximation. There ...
Added: June 28, 2018
Сапронов А. А., Aad G., Glazov A. et al., Journal of High Energy Physics 2016 Vol. 1608 No. 045 P. 1-75
Combined ATLAS and CMS measurements of the Higgs boson production and decay rates, as well as constraints on its couplings to vector bosons and fermions, are presented. The combination is based on the analysis of five production processes, namely gluon fusion, vector boson fusion, and associated production with a W or a Z boson or ...
Added: August 7, 2018
Aaij R., Arzymatov K., Belavin V. et al., Journal of High Energy Physics 2021 Vol. 5 Article 95
The Cabibbo-suppressed decay Λ0b → χc1pπ− is observed for the first time us- ing data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λ0b → χc2pπ− decay is also found. Using the Λ0b → χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be... where the first uncertainty is statistical, ...
Added: August 28, 2021
Сапронов А. А., Aad G., Glazov A., Physics Letters B 2016 Vol. 759 P. 601-621
Measurements of the W±→ℓ±ν and Z→ℓ+ℓ− production cross sections (where ℓ±=e±,μ± ) in proton–proton collisions at s=13 TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb −1 . The total inclusive W± -boson production cross sections times the single-lepton-flavour branching ratios ...
Added: August 7, 2018
Aaij R., Arzymatov K., Belavin V. et al., Journal of High Energy Physics 2021 Vol. 6 Article 19
Searches for CP violation in the two-body decays 𝐷+(𝑠)→ℎ+𝜋0D(s)+→h+π0 and 𝐷+(𝑠)→ℎ+𝜂D(s)+→h+η (where h+ denotes a π+ or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb−1 or 6 fb−1 of integrated luminosity. The π0 and η mesons are reconstructed using the e+e−γ final state, which can proceed as three-body decays π0 → e+e−γ and η → e+e−γ, or via the two-body decays π0 → γγ and η → γγ followed by a photon conversion. The measurements are ...
Added: August 26, 2021
Aaij R., Beteta C. A., Ustyuzhanin A. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2020 No. 102 P. 071101
The Ξc0 baryon is unstable and usually decays into charmless final states by the c→sud¯ transition. It can, however, also disintegrate into a π- meson and a Λc+ baryon via s quark decay or via cs→dc weak scattering. The interplay between the latter two processes governs the size of the branching fraction B(Ξc0→π-Λc+), first measured ...
Added: December 2, 2020
Aaij R., Beteta C. A., Arzymatov K. et al., Physical Review Letters 2020 Vol. 125 No. 23 Article 231801
A search for the decay K0S → μþμ− is performed using proton-proton collision data, corresponding to an integrated luminosity of 5.6 fb−1 and collected with the LHCb experiment during 2016, 2017, and 2018 at a center-of-mass energy of 13 TeV. The observed signal yield is consistent with zero, yielding an upper limit of BðK0S → ...
Added: August 27, 2021
World Scientific Publishing Co., 2021
This book has been designed to honor Lev Nikolaevich Lipatov, as a person and as one of the leading scientists in theoretical high energy physics.
The book begins with three articles on Lev as a person, written endearingly by family members, a very close friend and Physics professor, Eugene Levin, and another outstanding scientist, Alfred Mueller. ...
Added: February 1, 2022
Bondarenko S., Сапронов А. А., Computer Physics Communications 2013 No. 184 P. 2343-2350
mcsanc is a Monte-Carlo tool based on the SANC (Support for Analytic and Numeric Calculations for experiments at colliders) modules for higher order calculations in hadron collider physics. It allows to evaluate NLO QCD and EW cross sections for Drell-Yan processes (inclusive), associated Higgs and gauge boson production and single-top quark production in s- and ...
Added: June 27, 2018
Norman G., Saitov I., Sartan R., Contributions to Plasma Physics 2019 Vol. 59 No. 6 P. e201800173
Warm dense hydrogen is studied in the region of fluid–fluid phase transition within
the framework of the density functional theory. We report a procedure of obtaining
metastable states and calculate the equation of state. Metastable states are diagnosed by pair correlation functions and values of conductivity. We obtain a strong
overlapping through the density of metastable and equilibrium ...
Added: October 30, 2019
Пенза : ПГУ, 2015
В сборник трудов включены доклады юбилейного ХХ-го Международного симпозиума «Надежность и качество», проходившего с 25 по 31 мая 2015 г. в городе Пензе.
Рассмотрены актуальные проблемы теории и практики повышения надежности и качества; эффективности внедрения инновационных и информационных технологий в фундаментальных научных и прикладных исследованиях, образовательных и коммуникативных системах и средах, экономике и юриспруденции; методов и ...
Added: May 31, 2015
IEEE, 2015
Added: March 16, 2015
Guskova M., Shchur V., Shchur L., Lobachevskii Journal of Mathematics 2020 Vol. 41 No. 6 P. 992-995
We simulate the oscillation of the viscous drop in the viscous liquid. We combine methods of chromodynamics model and Shan-Chen pseudo-potential for the immiscible fluids. We measure the frequency of the first nontrivial eigenmode using the initial ellipsoid form of the drop. Drop oscillates about the equilibrium spherical form of radius $R$. Computed frequency as ...
Added: June 2, 2020
Буров А.А., Герман А. Д., Косенко И. И., Космические исследования 2014 Т. 52 № 4 С. 307-312
The problem of planar oscillations of a pendulum with variable length suspended on the Moon’s surface is considered. It is assumed that the Earth and Moon (or, in the general case, a planet and its satellite, or an asteroid and a spacecraft) revolve around the common center of mass in unperturbed elliptical Keplerian orbits. We ...
Added: November 8, 2014
Avetisov V. A., Иванов В. А., Мешков Д. А. et al., Письма в Журнал экспериментальной и теоретической физики 2013 Т. 98 № 4 С. 270-274
A fractal (crumpled) polymer globule, which is an unsual equilibrium state of a condenced unknotted macromolecule that is experimentally found in the DNA folding in human chromosomes, has been formed through the hierarchical collapse of a polymeric chain. The relaxation dynamics of the elasic network constructed through the contact matrix of the fractal globule has ...
Added: November 22, 2013
Kryzhanovskaya N., Maximov M., Zhukov A. et al., Journal of Lightwave Technology 2015 Vol. 33 No. 1 P. 171-175
A dense array of InGaAs quantum dots formed by MOCVD on a misoriented GaAs substrate has been used as an active medium of microdisk resonators of various types: a cylindrical disk, an undercut disk, and a suspended disk. Single-mode room temperature lasing in a 9-μm microdisk laser is demonstrated with a dominant line around 1.13 ...
Added: September 30, 2020
Молотков С. Н., Арбеков И. М., Журнал экспериментальной и теоретической физики 2017 Т. 152 № 1 С. 62-78
The proof of the security of quantum key distribution is a rather complex problem. Security is
defined in terms different from the requirements imposed on keys in classical cryptography. In quantum
cryptography, the security of keys is expressed in terms of the closeness of the quantum state of an eavesdropper
after key distribution to an ideal quantum state ...
Added: March 2, 2018
Prazdnichnykh A., Glazov M., Ren L. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 No. 8 P. 085302-1-085302-12
The exciton valley dynamics in van der Waals heterostructures with transition metal dichalcogenide monolayers is driven by the long-range exchange interaction between the electron and the hole in the exciton. It couples the states active in the opposite circular polarizations resulting in the longitudinal-transverse splitting of excitons propagating in the monolayer plane. Here we study ...
Added: March 5, 2021
Burovskiy E., Cheianov V., Gamayun O. et al., Physical Review A: Atomic, Molecular, and Optical physics 2014 Vol. 89 P. 041601
We investigate the time evolution of the momentum of an impurity atom injected into a degenerate Tonks-Girardeau gas. We establish that given an initial momentum p0 the impurity relaxes to a steady state with a nonvanishing momentum p∞. The nature of the steady state is found to depend drastically on whether the masses of the impurity and the host ...
Added: September 7, 2016
Timofeev A., Nikolaev V. S., Journal of Physics: Conference Series 2018 Vol. 946 No. 012146 P. 1-8
It is often suggested that inter-particle distance in stable dusty plasma structures decreases with cooling as a square root of neutral gas temperature. Deviations from this dependence (up to the increase at cryogenic temperatures) found in the experimental results for the pressures range 0.1–8.0 mbar and for the currents range 0.1–1.0 mA are given. Inter-particle ...
Added: October 31, 2018
Сапронов А. А., Aaboud M., Journal of High Energy Physics 2017 Vol. 2017 No. 12 P. 1-78
This paper presents a measurement of the triple-differential cross section for the Drell-Yan process Z/γ * → ℓ + ℓ − where ℓ is an electron or a muon. The measurement is performed for invariant masses of the lepton pairs, m ℓℓ , between 46 and 200 GeV using a sample of 20.2 fb−1of pp collisions data at a centre-of-mass energy of s√=8s=8 TeV collected by the ATLAS detector at the LHC ...
Added: February 26, 2018
Зеленый Л. М., Григоренко Е. Е., Малова Х. В. et al., Письма в Журнал экспериментальной и теоретической физики 2018 Т. 108 № 8 С. 586-599
В статье представлены наблюдения токовых конфигураций с магнитным широм в хвосте магнитосферы Земли спутниковым квартетом Cluster, и в солнечном ветре - спутником Wind. Показано, что в токовых конфигурациях с магнитным широм наблюдаются следующие структурные особенности: 1) утолщение токового слоя; 2) распределение плотности плазмы, асимметричное относительно плоскости слоя; 3) формирование асимметричного профиля плотности тока. Рассмотрены кинетические ...
Added: March 5, 2020
Roman Moskalenko, Evgeni Burovski, Shchur L., Journal of Physics: Conference Series 2021 Vol. 1740 Article 012057
We consider a spatially distributed evolutionary game based on the Prisoner’s
Dilemma with agents arranged on a three-dimensional simple cubic lattice. Comparing to twodimensional arrangements, we find that the larger number of neighbors favors the formation of
spatial chaos: the steady state of the game is chaotic unless the payoff parameter is small. ...
Added: January 23, 2021