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News
May 25, 2026
HSE Scientists Train Neural Network to 'Hear' Faults in Electric Motors
Researchers at the AI and Digital Science Institute of the HSE Faculty of Computer Science have developed a new method—the Signature-Guided Data Augmentation (SGDA) framework—that achieves 99% accuracy in motor fault detection and 86% accuracy in fault classification. The application of this approach can reduce industrial equipment repair costs, minimise downtime, and improve production safety. The study results have been published in Engineering Applications of Artificial Intelligence.
May 25, 2026
'The Humanities Serve as a Conscience'
Maria Mizernaia studies Soviet literature and the history of book publishing. In this interview for the HSE Young Scientists project, she discusses plans to publish a novel about besieged Leningrad, AI-provoked reflections on what it means to be human, and how novels can help satisfy our dopamine hunger.
May 25, 2026
Is It Possible to Predict a Citys Life Based on the Shape of Its Neighbourhoods?
Is it possible to predict, based on the configuration of streets and buildings, where a café will open or where traffic congestion will occur? Participants in the Spatial Analysis and Modelling of Urban Processes research and study group use open data and machine learning to identify universal patterns. Alexander Sheludkov and Eduard Somov discuss the purpose of comparing cities, the need for new forms of urban statistics, and how open data is transforming approaches to urban studies.

 

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Физика элементарных частиц и атомного ядра

Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд), 2023.
Chapters
Neutron reconstruction in the BM@N experiment using machine learning
Bocharnikov V., Derkach D., Ratnikov F., , in: Физика элементарных частиц и атомного ядра.: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд), 2023. Ch. 55 P. 995–999.
At present, new compact highly granular neutron detector is being developed for the BM@N experiment. This detector will be used to identify neutrons, to measure their energies using time-of-flight method, neutron yields and azimuthal flow of neutrons in heavy-ion collisions at beam energies up to 4A GeV. Application of machine learning techniques and preliminary results ...
Added: December 11, 2023
Language: English
Keywords: nuclear physicselementary particle physics
Физика элементарных частиц и атомного ядра
Similar publications
Conceptual design report of the Super Tau-Charm Facility: the accelerator
Ai X., An L., An S. et al., Nuclear Science and Techniques/Hewuli 2025 Vol. 36 Article 242
Electron–positron colliders operating in the GeV center-of-mass range, or tau-charm energy region, have been proved to enable competitive frontier research due to several unique features. With the progress of high-energy physics in the last two decades, a new-generation Tau-Charm factory, called the Super Tau-Charm Facility (STCF), has been actively promoted by the particle physics community ...
Added: December 5, 2025
First Determination of the Spin-Parity of Ξ𝑐⁢(3055)+,0 Baryons
Ratnikov F., Hushchyn M., Bocharnikov V. et al., Physical Review Letters 2025 Vol. 134 Article 081901
The Ξ0⁢(−)𝑏→Ξ𝑐⁢(3055)+(0)⁢(→𝐷+(0)⁢Λ)⁢𝜋− decay chains are observed, and the spin-parity of Ξ𝑐⁢(3055)+(0) baryons is determined for the first time. The measurement is performed using proton-proton collision data at a center-of-mass energy of √𝑠 =13  TeV, corresponding to an integrated luminosity of 5.4  fb−1, recorded by the LHCb experiment between 2016 and 2018. The spin-parity of the Ξ𝑐⁢(3055)+(0) baryons is determined to be 3/2+ with a significance of more than 6.5⁢𝜎 (3.5⁢𝜎) ...
Added: December 4, 2025
MPD physics performance studies in Bi+Bi collisions at √sNN = 9.2 GeV
Derkach D., Ratnikov F., Курбатов Е. О., Revista Mexicana de Fisica 2025 Vol. 71 No. 4 P. 041201
TheMulti-Purpose Detector (MPD) is one of the three experiments of the Nuclotron Ion Collider-fAcility (NICA) complex, which is currently under construction at the Joint Institute for Nuclear Research in Dubna. With collisions of heavy ions in the collider mode, the MPD will cover the energy range √sNN = 4 − 11 GeV to scan the ...
Added: December 4, 2025
Measurement of the Branching Fraction Ratios 𝑅(𝐷+) and 𝑅(𝐷*+) Using Muonic 𝜏 Decays
Ratnikov F., Hushchyn M., Ryzhikov A. et al., Physical Review Letters 2025 Vol. 134 Article 061801
The branching fraction ratios of ¯𝐵0→𝐷+⁢𝜏−⁢¯𝜈𝜏 and ¯𝐵0→𝐷*+⁢𝜏−⁢¯𝜈𝜏 decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0  fb−1 collected by the LHCb experiment in proton-proton collisions at √𝑠 =13  TeV. The reconstructed final states are formed by combining 𝐷+ mesons with 𝜏−→𝜇−⁢¯𝜈𝜇⁢𝜈𝜏 candidates, where the 𝐷+ is reconstructed via the 𝐷+ →𝐾−⁢𝜋+⁢𝜋+ decay. The results are 𝑅⁡(𝐷+)=0.249±0.043±0.047, 𝑅⁡(𝐷*+)=0.402±0.081±0.085, where the first uncertainties are statistical and ...
Added: December 4, 2025
Amplitude analysis of B+ → ψ(2S)K+π+π− decays
Ratnikov F., Bocharnikov V., Boldyrev A. et al., Journal of High Energy Physics 2025 Article 54
The first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K1(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An ...
Added: December 4, 2025
Observation of Exotic 𝐽/𝜓𝜙 Resonant Structure in Diffractive Processes in Proton-Proton Collisions
Ratnikov F., Hushchyn M., Ryzhikov A. et al., Physical Review Letters 2025 Vol. 134 Article 031902
The first study of 𝐽/𝜓⁢𝜙 production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5  fb−1. The data disfavor a nonresonant 𝐽/𝜓⁢𝜙 production but are consistent with a resonant model including several resonant states observed previously only in 𝐵+→𝐽/𝜓⁢𝜙⁢𝐾+ decays. The 𝜒𝑐⁢0⁡(4500) state is observed ...
Added: December 4, 2025
Measurement of 𝐷0−¯𝐷0 mixing and search for 𝐶𝑃 violation with 𝐷0→𝐾+𝜋− decays
Ratnikov F., Hushchyn M., Bocharnikov V. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2025 Vol. 111 Article 012001
A measurement of the time-dependent ratio of the 𝐷0 →𝐾+⁢𝜋− to ¯𝐷0→𝐾+⁢𝜋− decay rates is reported. The analysis uses a sample of proton-proton collisions corresponding to an integrated luminosity of 6  fb−1 recorded by the LHCb experiment from 2015 through 2018 at a center-of-mass energy of 13 TeV. The 𝐷0 meson is required to originate from a 𝐷*⁢(2010)+→𝐷0⁢𝜋+ decay, such that its flavor at production is inferred from ...
Added: December 4, 2025
First Determination of the Spin-Parity of Ξ𝑐(3055)+,0 Baryons
Derkach D., Bocharnikov V., Hushchyn M. et al., Physical Review Letters 2025 Vol. 134 Article 081901
The Ξ0⁢(−)𝑏→Ξ𝑐⁢(3055)+(0)⁢(→𝐷+(0)⁢Λ)⁢𝜋− decay chains are observed, and the spin-parity of Ξ𝑐⁢(3055)+(0) baryons is determined for the first time. The measurement is performed using proton-proton collision data at a center-of-mass energy of √𝑠 =13  TeV, corresponding to an integrated luminosity of 5.4  fb−1, recorded by the LHCb experiment between 2016 and 2018. The spin-parity of the Ξ𝑐⁢(3055)+(0) baryons is determined to be 3/2+ with a significance of more than 6.5⁢𝜎 (3.5⁢𝜎) ...
Added: December 4, 2025
Test of Lepton Flavor Universality with 𝐵0𝑠 →𝜙ℓ+ℓ− Decays
Ratnikov F., Bocharnikov V., Boldyrev A. et al., Physical Review Letters 2025 Vol. 134 Article 121803
Lepton flavor universality in rare 𝑏 →𝑠 transitions is tested for the first time using 𝐵0𝑠 meson decays. The measurements are performed using 𝑝⁢𝑝 collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9  fb−1. Branching fraction ratios between the 𝐵0𝑠→𝜙⁢𝑒+⁢𝑒− and 𝐵0𝑠 →𝜙⁢𝜇+⁢𝜇− decays are measured in three regions of dilepton mass squared, 𝑞2, with 0.1<𝑞2<1.1, 1.1 <𝑞2 <6.0, and 15<𝑞2<19  GeV2/𝑐4. The results agree with ...
Added: December 4, 2025
Measurements of ψ(2S) and χc1(3872) production within fully reconstructed jets
Ratnikov F., Hushchyn M., Boldyrev A. et al., The European Physical Journal C - Particles and Fields 2025 Vol. 85 Article 562
This paper presents the first measurement of ψ(2S) and χc1(3872) meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its decay to the J/ψ(→μ+μ−)π+π− final state in the forward region using proton-proton collision data collected by the LHCb experiment at the center-of-mass-energy of 13TeV in 2016, corresponding to an integrated luminosity of 1.64fb−1. The fragmentation function, presented as the ratio ...
Added: December 4, 2025
Study of Ds1(2460)+→D+sπ+π− in B→D¯(∗)D+sπ+π− decays
Ratnikov F., Ryzhikov A., Hushchyn M. et al., Science Bulletin 2025 Vol. 70 No. 9 P. 1432–1444
An amplitude analysis of the Ds1(2460)+→D+sπ+π− transition is performed simultaneously in B0→D−D+sπ+π−, B+→D¯0D+sπ+π−, and B0→D∗−D+sπ+π− decays. The study is based on a data sample of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of s√=7,8, and 13TeV, corresponding to a total integrated luminosity of 9fb−1. A clear double-peak structure is observed in the m(π+π−) spectrum of the Ds1(2460)+→D+sπ+π− decay. The data can be described either with a ...
Added: December 4, 2025
First Evidence for Direct 𝐶⁢𝑃 Violation in Beauty to Charmonium Decays
Ratnikov F., Ryzhikov A., Hushchyn M. et al., Physical Review Letters 2025 Vol. 134 Article 101801
The 𝐶⁢𝑃 asymmetry and branching fraction of the Cabibbo-Kobayashi-Maskawa-suppressed decay 𝐵+ →𝐽/𝜓⁢𝜋+ are precisely measured relative to the favored decay 𝐵+ →𝐽/𝜓⁢𝐾+ using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.4  fb−1 recorded at a center-of-mass energy of 13 TeV during 2016–2018. The results of the 𝐶⁢𝑃 asymmetry difference and branching fraction ratio are Δ⁢𝒜𝐶⁢𝑃≡𝒜𝐶⁢𝑃⁡(𝐵+→𝐽/𝜓⁢𝜋+)−𝒜𝐶⁢𝑃⁡(𝐵+→𝐽/𝜓⁢𝐾+)=(1.29±0.49±0.08)×10−2, ℛ𝜋/𝐾≡[ℬ⁡(𝐵+→𝐽/𝜓⁢𝜋+)/ℬ⁡(𝐵+→𝐽/𝜓⁢𝐾+)]=(3.852±0.022±0.018)×10−2, where the first uncertainties are statistical and the second are ...
Added: December 4, 2025
Observation of the Open-Charm Tetraquark Candidate 𝑇*𝑐𝑠0(2870)0 in the 𝐵−→𝐷−𝐷0𝐾0 𝑆 Decay
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review Letters 2025 Vol. 134 No. 10 Article 101901
An amplitude analysis of 𝐵−→𝐷−⁢𝐷0⁢𝐾0𝑆 decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9  fb−1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A resonant structure of spin-parity 0+ is observed in the 𝐷0⁢𝐾0𝑆 invariant-mass spectrum with a significance of 5.3⁢𝜎. The mass and width of the state, modeled with a Breit-Wigner line shape, ...
Added: December 4, 2025
Test of Lepton Flavor Universality with 𝐵+→𝐾+⁢𝜋+⁢𝜋−⁢ℓ+⁢ℓ− Decays
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review Letters 2025 Vol. 134 No. 18 Article 181803
The first test of lepton flavor universality between muons and electrons using 𝐵+→𝐾+⁢𝜋+⁢𝜋−⁢ℓ+⁢ℓ− (ℓ =𝑒, 𝜇) decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9  fb−1. The ratio of branching fractions between 𝐵+→𝐾+⁢𝜋+⁢𝜋−⁢𝑒+⁢𝑒− and 𝐵+→𝐾+⁢𝜋+⁢𝜋−⁢𝜇+⁢𝜇− decays is measured in the dilepton invariant-mass-squared ...
Added: December 4, 2025
Study of light-meson resonances decaying to 𝐾0S𝐾𝜋 in the 𝐵 →(𝐾0S𝐾𝜋)𝐾 channels
Ratnikov F., Bocharnikov V., Ryzhikov A. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2025 Vol. 111 Article 092009
A study is presented of 𝐵+ →𝐾0S⁢𝐾−⁢𝜋+⁢𝐾+ and 𝐵+ →𝐾0S⁢𝐾+⁢𝜋−⁢𝐾+ decays based on the analysis of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9  fb−1. The 𝐾0S⁢𝐾⁢𝜋 invariant-mass distributions of both 𝐵+ decay modes show, in the 𝑚⁡(𝐾0S⁢𝐾⁢𝜋) <1.85  GeV mass region, large activity which is resolved using an amplitude analysis. A simple model, where 𝐽𝑃⁢𝐶 amplitudes are ...
Added: December 4, 2025
Search for charge-parity violation in semileptonically tagged D0 → K+π− decays
Ratnikov F., Hushchyn M., Bocharnikov V. et al., Journal of High Energy Physics 2025 Article 149
An analysis of the flavour oscillations of the charmed neutral meson is presented. The ratio of D0 → K+π− and D0 → K−π+ decay rates is measured as a function of the decay time of the D0 meson and compared with the charge-conjugated system to search for charge-parity violation. The meson flavour at production is double-tagged by the charges of the muon and pion in ...
Added: December 4, 2025
Search for resonance-enhanced 𝐶⁢𝑃 and angular asymmetries in the Λ+𝑐 →𝑝⁢𝜇+⁢𝜇− decay at LHCb
Ratnikov F., Bocharnikov V., Boldyrev A. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2025 Vol. 111 Article L091102
The first measurement of the 𝐶⁢𝑃 asymmetry of the decay rate (𝐴𝐶⁢𝑃) and the 𝐶⁢𝑃 average (Σ⁢𝐴FB) and 𝐶⁢𝑃 asymmetry (Δ⁢𝐴FB) of the forward-backward asymmetry in the muon system of Λ+𝑐 →𝑝⁢𝜇+⁢𝜇− decays is reported. The measurement is performed using a data sample of proton-proton collisions, recorded by the LHCb experiment from 2016 to 2018 at a center-of-mass energy of 13 TeV, which corresponds to ...
Added: December 3, 2025
Branching fraction measurement of the decay 𝐵+ →𝜓⁡(2⁢𝑆)⁢𝜙⁡(1020)⁢𝐾+
Ratnikov F., Boldyrev A., Hushchyn M. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2025 Vol. 111 Article 092008
The branching fraction of the decay 𝐵+ →𝜓⁡(2⁢𝑆)⁢𝜙⁡(1020)⁢𝐾+, relative to the topologically similar decay 𝐵+ →𝐽/𝜓⁢𝜙⁡(1020)⁢𝐾+, is measured using proton-proton collision data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9  fb−1. The ratio is found to be 0.061 ±0.004 ±0.009, where the first uncertainty is statistical and the second systematic. Using the ...
Added: December 3, 2025
Observation of charge–parity symmetry breaking in baryon decays
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Nature 2025 Vol. 643 No. 8074 P. 1223–1228
The Standard Model of particle physics—the theory of particles and interactions at the smallest scale—predicts that matter and antimatter interact differently due to violation of the combined symmetry of charge conjugation (C) and parity (P). Charge conjugation transforms particles into their antimatter particles, whereas the parity transformation inverts spatial coordinates. This prediction applies to both ...
Added: December 3, 2025
Search for the B+c → χc1(3872)π+ decay
Ratnikov F., Boldyrev A., Journal of High Energy Physics 2025 Vol. 2025 No. 6 Article 13
A search for the decay  Bc→ χc1(3872)π+ is reported using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. No significant signal is observed. Using the decay  Bc→ ψ(2S)π+ as a normalisation channel, an upper limit for the ...
Added: December 3, 2025
Angular analysis of the decay B0s → ϕe+e−
Ratnikov F., Boldyrev A., Journal of High Energy Physics 2025 Article 69
An angular analysis of the decay  Bs→ ϕe+e− is presented, using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energies of 7, 8 and 13 TeV. The combined dataset corresponds to an integrated luminosity of 9 fb−1. Observables are determined by fitting time-integrated projections of the angular distribution in three ...
Added: December 3, 2025
Observation of the Very Rare Σ+→𝑝⁢𝜇+⁢𝜇− Decay
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Physical Review Letters 2025 Vol. 135 No. 5 Article 051801
The first observation of the Σ+ →𝑝⁢𝜇+⁢𝜇− decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 5.4  fb−1, collected with the LHCb detector at a center-of-mass energy of 13 TeV. A yield of 237±16  Σ+→𝑝⁢𝜇+⁢𝜇− decays is obtained, where the uncertainty is statistical only. A branching fraction of (1.08±0.17)×10−8 is measured, where the uncertainty includes statistical and systematic sources. ...
Added: December 3, 2025
Observation of the decay $ {B}_s^0\to {K}^0p\overline{p} $ and measurement of the $ {B}_{(s)}^0\to {K}^0p\overline{p} $ branching fractions
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Journal of High Energy Physics 2025 Vol. 2025 No. 7 Article 121
A study of the charmless baryonic decays  is presented, where  denotes either a B0 or a  meson. The analysis is based on proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The decay  is observed for the first time, with a measured branching fraction of ...
Added: December 3, 2025
Three-pion Bose-Einstein correlations measured in proton-proton collisions
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., Journal of High Energy Physics 2025 Article 174
A study on the Bose-Einstein correlations for triplets of same-sign pions is presented. The analysis is performed using proton-proton collisions at a centre-of-mass energy of  = 7 TeV, recorded by the LHCb experiment, corresponding to an integrated luminosity of 1.0 fb−1. For the first time, the results are interpreted in the core-halo model. The parameters of ...
Added: December 3, 2025
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