?
Search for the B+c → χc1(3872)π+ decay
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 ratio of branching fractions
Publication based on the results of:
Dmitriev A., Kornilov V., Batienkov R., Lecture Notes in Civil Engineering 2026 Vol. 886 P. 249–255
Numerous studies have provided compelling evidence that the probability distribution of avalanche sizes follows a power law, and that 1/f noise is present in the stochastic dynamics of landslides. We present a theoretical explanation of these phenomena within the framework of self-organized criticality theory, proposing a discrete-time model in the form of a sandpile cellular ...
Added: October 13, 2026
Dmitriev A., Shulman I., Lebedev A., Studies in Computational Intelligence 2026 Vol. 1265 P. 266–273
A discrete-time model is presented for the self-organization of the X/Twitter social network to the edge of a phase transition, characterized by avalanche-like propagation of information in the network. The model is based on the analogy between the critical dynamics of the X social network and sandpile cellular automata with Manna rule on the Chung-Lu ...
Added: October 13, 2026
Arutyunov K., Kharitonov I. A., Petrosyants K. O., JETP Letters 2026 Vol. 124 No. 6 P. 1–16
Superconducting properties of metallic micro- and nanowires can be entirely different from those of bulk superconductors. Of particular interest is the nonequilibrium current-induced state of a quasi-one-dimensional superconducting channel. The most interesting phenomenon here is the stepped I–V characteristic, explained by a process known as phase slip center activation. If the origin of such step-like ...
Added: October 13, 2026
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Махлуф М., Ozhegov R., Elezov M. et al., Фотоника 2026 Vol. 20 No. 6 P. 414–423
This paper compares the ranging precision of direct time-of-flight (dToF) and non-line-of-sight (NLOS) LiDAR architectures, both using a superconducting nanowire single-photon detector (SNSPD). Both systems operate at 1550 nm with a 50 ps pulsed laser and time-correlated single-photon counting (TCSPC). The dToF configuration achieved approximately 100 µm precision at 10 m, while the NLOS configuration achieved 500 µm precision for ...
Added: October 12, 2026
Singapore: Springer, 2026.
This volume presents the Proceedings of the 34th IUPAP Conference on Computational Physics (CCP2023), held in Kobe, Japan on August 4–8, 2023. It offers a collection of peer-reviewed articles that highlight recent developments in computational and simulation research across various areas of physics. Key topics include the use of data science, quantum computing, and machine ...
Added: October 12, 2026
Goncharov A., Chibisov A., Advanced Theory and Simulations 2023 Vol. 12 No. 13 Article 2200816
Designing stable quantum computers with the ability to correct errors responsibly requires a detailed understanding of the physical processes that underlie these devices. In this study, detailed quantum mechanical simulations of the atomic structure, charge distribution of electron density, and distribution and orientation of magnetic and quantum states as a function of applied external pressure ...
Added: October 11, 2026
Chibisov A., Gnidenko A., Chibisova M. et al., FlatChem 2023 Vol. 41 Article 100533
Manufacturing precise quantum computers with small errors in quantum operations, long coherence times, and low power consumption is the most important challenge in modern nanoelectronics. To understand the operating modes of such calculators in detail, both the optimal arrangement of the qubit system within the structure and changes in its magnetic properties must be comprehensively ...
Added: October 11, 2026
Ali S., Bocharnikov V., Ratnikov F. et al., Sensors 2026 Vol. 26 No. 16 Article 5024
Large distributed sensor arrays require repeated recalibration as radiation damage, material aging, gain variation, and readout drift alter channel responses. We studied a high-granularity calorimeter as a large sensor array and addressed unsupervised recalibration from two unpaired datasets: a nominal reference response and an aged response with attenuated cell-wise signals. Aging was modeled by a ...
Added: August 11, 2026
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
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 6.5𝜎 (3.5𝜎) ...
Added: December 4, 2025
Abdulin R., Abgaryan V., Adhikary R. et al., Revista Mexicana de Fisica 2025 Vol. 71 No. 4 Article 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
Ratnikov F., Hushchyn M., Boldyrev A. et al., The European Physical Journal C - Particles and Fields 2025 Vol. 85 Article 7
Charged-particle trajectories are usually reconstructed with the LHCb detector using combined information from the tracking devices placed upstream and downstream of the 4 T m dipole magnet. Trajectories reconstructed using only information from the tracker downstream of the dipole magnet, which are referred to as T tracks, have not been used for physics analysis to date. The ...
Added: December 4, 2025
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−¯𝜈𝜇𝜈𝜏 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
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
Ratnikov F., Hushchyn M., Ryzhikov A. et al., Physical Review Letters 2025 Vol. 134 Article 031902
The first study of 𝐽/𝜓𝜙 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/𝜓𝜙 production but are consistent with a resonant model including several resonant states observed previously only in 𝐵+→𝐽/𝜓𝜙𝐾+ decays. The 𝜒𝑐0(4500) state is observed ...
Added: December 4, 2025
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)+→𝐷0𝜋+ decay, such that its flavor at production is inferred from ...
Added: December 4, 2025
Ratnikov F., Hushchyn M., Bocharnikov V. et al., Journal of High Energy Physics 2025 Article 61
A time-dependent, flavour-tagged measurement of CP violation is performed with B0→D+D− and B0s→D+sD−s decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 6 fb−1. In B0→D+D− decays the CP-violation parameters are measured to be
SD+D−CD+D−=−0.552±0.100(stat)±0.010(syst),=0.128±0.103(stat)±0.010(syst).
In B0s→D+sD−s decays the CP-violating parameter formulation in terms of ϕs and |λ| results in
ϕs|λD+sD−s|=−0.086±0.106(stat)±0.028(syst)rad,=1.145±0.126(stat)±0.031(syst).
These results represent the most precise single measurement of ...
Added: December 4, 2025
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., SCIPOST PHYSICS 2025 Vol. 18 Article 071
Measurements are presented of the cross-section for the central exclusive production of J/ψ→μ+μ− and ψ(2S)→μ+μ− processes in proton-proton collisions at √s=13 TeV with 2016–2018 data. They are performed by requiring both muons to be in the LHCb acceptance (with pseudorapidity 2<ημ±<4.5) and mesons in the rapidity range 2.0<y<4.5. The integrated cross-section results areσJ/ψ→μ+μ−(2.0<yJ/ψ<4.5,2.0<ημ±<4.5)=400±2±5±12 pb,σψ(2S)→μ+μ−(2.0<yψ(2S)<4.5,2.0<ημ±<4.5)=9.40±0.15±0.13±0.27 pb,where the uncertainties are statistical, systematic and due to the luminosity determination. ...
Added: December 4, 2025
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 6.5𝜎 (3.5𝜎) ...
Added: December 4, 2025
Ratnikov F., Hushchyn M., Boldyrev A. et al., The European Physical Journal C - Particles and Fields 2025 Vol. 85 Article 20
A search for the very rare B∗0→μ+μ− and B∗0s→μ+μ− decays is conducted by analysing the B+c→π+μ+μ− process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9\,fb−1. The signal signatures correspond to simultaneous peaks in the μ+μ− and π+μ+μ− invariant masses. No evidence for an excess of events over background is observed for ...
Added: December 4, 2025
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 𝑝𝑝 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→𝜙𝑒+𝑒− and 𝐵0𝑠 →𝜙𝜇+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