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First Simultaneous Determination of Inclusive and Exclusive |Vub|
Physical Review Letters. 2023. Vol. 131. No. 21. Article 211801.
Cao L., Bernlochner F., Tackmann K., Adachi I., Aihara H., Al Said S., Asner D. M., T. Aushev, D. Bodrov, P. Pakhlov, G. Pakhlova, T. Uglov
The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element Vub using inclusive and exclusive decays is performed with the full Belle data set at the Υ(4S) resonance, corresponding to an integrated luminosity of 711 fb−1. We analyze collision events in which one B meson is fully reconstructed in hadronic modes. This allows for the reconstruction of the hadronic Xu system of the semileptonic b→uℓν¯ℓ decay. We separate exclusive B→πℓν¯ℓ decays from other inclusive B→Xuℓν¯ℓ and backgrounds with a two-dimensional fit, that utilizes the number of charged pions in the Xu system and the four-momentum transfer q2 between the B and Xu system. Combining our measurement with information from lattice QCD and QCD calculations of the inclusive partial rate as well as external experimental information on the shape of the B→πℓν¯ℓ form factor, we determine ∣∣Vexcl.ub∣∣=(3.78±0.23±0.16±0.14)×10−3 and ∣∣Vincl.ub∣∣=(3.88±0.20±0.31±0.09)×10−3, respectively, with the uncertainties being the statistical error, systematic errors, and theory errors. The ratio of ∣∣Vexcl.ub∣∣/∣∣Vincl.ub∣∣=0.97±0.12 is compatible with unity.
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
Pakhlova G., Bodrov D., Aushev Т. et al., Physical Review Letters 2026 Vol. D No. 113 Article 052009
We search for the e+ e- -> gamma chi_bJ (J = 0, 1, 2) processes at center-of-mass energies sqrt(s) = 10.653, 10.701, 10.746, and 10.804 GeV. These data were collected with the Belle II detector at the SuperKEKB collider and correspond to 3.5, 1.6, 9.8, and 4.7 fb^-1 of integrated luminosity, respectively. We set upper ...
Added: October 2, 2026
Pakhlov P., Pakhlova G., Bodrov D. et al., Physical Review Letters 2026 No. 137 Article 071803
We report the first searches for charged-lepton-flavor violation in decays of chi_bJ(1P) (J = 0, 1, and 2) to a pair of charged leptons using 158 million Y(2S) decays collected with the Belle detector in e+ e- collisions at the KEKB collider. No significant signal is observed, and we set upper limits on the branching ...
Added: October 1, 2026
Kovanova M. A., Postnov A. S., A. S. Vashurin, Russian Journal of Physical Chemistry A 2024 Vol. 98 No. 6 P. 1318–1321
The electrochemical properties of vitamin B6 have been studied. Its analytical signal was obtained using a gold electrode modified with cobalt(II) tetra-4-sulfophthalocyaninate. The optimum experimental conditions were determined. A technique for immobilizing the modifier on the surface of the gold electrode is proposed. The mechanism of vitamin B6 oxidation on the electrode was examined. ...
Added: September 16, 2025
Kinoshita K., Aihara H., Aushev T. et al., Science Bulletin 2023
We report a study of Λ+c→Λh+ and Λ+c→Σ0h+ (h=K,π) decays based on a data sample of 980~fb−1 collected with the Belle detector at the KEKB energy-asymmetric e+e− collider. The first results of direct CP asymmetry in two-body singly Cabibbo-suppressed (SCS) decays of charmed baryons are measured, AdirCP(Λ+c→ΛK+)=+0.021±0.026±0.001 and AdirCP(Λ+c→Σ0K+)=+0.025±0.054±0.004. We also make the most precise measurement of the decay asymmetry parameters (α) for the four modes of ...
Added: December 1, 2023
Chang C. -., Wang M. -., Adachi I. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 108 No. 5 Article 052011
We search for the B0→p¯Σ0π− decay with ¯Σ0→¯Λγ, where the γ is not measured, using a data sample corresponding to an integrated luminosity of 711 fb−1 which contains 772×106 B¯B pairs, collected around the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We measure for the first time the B0→p¯Σ0π− branching fraction to be B(B0→p¯Σ0π−)=(1.17+0.43−0.40(stat)±0.07(syst))×10−6 with a significance of 3.0σ. We simultaneously measure the branching fraction for the related channel B0→p¯Λπ− with much ...
Added: December 1, 2023
Hsu C. -., Sevior M. E., Adachi I. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 107 No. 3 Article 032013
We study the decay B+→K+K−π+ and investigate the angular distribution of K+K− pairs with invariant mass below 1.1 GeV/c2. This region exhibits both a strong enhancement in signal and very large direct CP violation. We construct a coherent sum model for the angular distribution of S- and P-wave, and report the ratio of their amplitudes, the relative phase and the forward-backward asymmetry. We also report ...
Added: December 1, 2023
Lai Y. -., Adachi I., Aihara H. et al., Physical Review Letters 2023 Vol. 130 No. 18 Article 181804
We study B+→π+π0π0 using 711 fb−1 of data collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10−6 and an inclusive CP asymmetry of (9.2±6.8±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+→ρ(770)+π0 branching fraction of (11.2±1.1±0.9+0.8−1.6)×10−6, where the third uncertainty is due to possible interference with B+→ρ(1450)+π0. We present the first observation of ...
Added: November 30, 2023
Teramoto Y., Uehara S., Adachi I. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 108 No. 1 Article 012004
We report the first measurement of the Q2 distribution of X(3915) produced by single-tag two-photon interactions. The decay mode used is X(3915)→J/ψω. The covered Q2 region is from 1.5 (GeV/c)2 to 10.0 (GeV/c)2. We observe 7.9±3.1(stat.)±1.5(syst.) events, where we expect 4.1±0.7 events based on the Q2=0 result from the no-tag two-photon process, extrapolated to higher Q2 region using the cc¯ model of Schuler, Berends, and van Gulik. The shape of the distribution is ...
Added: November 30, 2023
Hirata H., Adachi I., Aushev T. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 107 No. 11 Article 112011
We present a study of the X(3872) lineshape in the decay B→X(3872)K→D0¯D*0K using a data sample of 772×106 B¯B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. The peak near the threshold in the D0¯D*0 invariant mass spectrum is fitted using a relativistic Breit-Wigner lineshape. We determine the mass and width parameters to be mBW=3873.71+0.56−0.50(stat)±0.13(syst) MeV/c2 and ΓBW=5.2+2.2−1.5(stat)±0.4(syst) MeV, respectively. The branching fraction is found ...
Added: November 30, 2023
Nayak L., Aihara H., Aushev T. et al., Journal of High Energy Physics 2023 Article 178
We present a search for the lepton-flavor-violating decays B0s→ℓ∓τ±, where ℓ=e,μ, using the full data sample of 121 fb−1 collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We use B0sB¯¯¯¯0s events in which one B0s meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for B0s→ℓ∓τ± decays and set upper limits on their ...
Added: November 30, 2023
Watanuki S., Marino G. d., Trabelsi K. et al., Physical Review Letters 2023 Vol. 130 No. 26 Article 261802
We present a search for the lepton-flavour-violating decays B+→K+τ±ℓ∓, with ℓ=(e,μ), using the full data sample of 772×106 BB¯¯¯¯ pairs recorded by the Belle detector at the KEKB asymmetric-energy e+e− collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. We find no evidence for B±→K±τℓ decays and set upper limits on their branching fractions at the 90% confidence ...
Added: November 30, 2023
Zhukova V., Mizuk R., Adachi I. et al., Journal of High Energy Physics 2023 Vol. 2023 Article 131
We report the first measurement of the inclusive e+e−→bb¯→D±sX and e+e−→bb¯→D0/D¯0X cross sections in the energy range from 10.63 to 11.02. Based on these results, we determine σ(e+e−→B0sB¯0sX) and σ(e+e−→BB¯X) in the same energy range. We measure the fraction of B0s events at Υ(10860) to be fs=(22.0+2.0−2.1)%. We determine also the ratio of the B0s inclusive branching fractions B(B0s→D0/D¯0X)/B(B0s→D±sX)=0.416±0.018±0.092. The results are obtained using the data collected with the Belle detector at the KEKB ...
Added: November 30, 2023
Yin J. H., Li Y. B., Won E. et al., Journal of High Energy Physics 2023 Vol. 2023 Article 121
We measure the cross section of e+e− → ηcJ/ψ at the Υ(nS)(n = 1–5) on-resonance and 10.52 GeV off-resonance energy points using the full data sample collected by the Belle detector with an integrated luminosity of 955 fb−1. We also search for double charmonium production in e+e− → ηcJ/ψ via initial state radiation near the ηcJ/ψ threshold. No evident signal of the double charmonium state is ...
Added: November 30, 2023
Mikhailov S., Voprosy Jazykoznanija 2024 No. 1 P. 7–38
Uralic possessive agreement markers often function as determiners. This paper presents a case study of the Northern Khanty (Kazym dialect) 2sg Possessive that developed into a “salient article”. The Salient Article is definite as it requires informational uniqueness and familiarity, but its distribution is narrower than the distribution of previously described definite determiner types. It ...
Added: November 10, 2023
Bodrov D., Pakhlov P., Adachi I. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2023 Vol. 108 No. 1 Article 012003
We present the first measurement of the Michel parameter ξ′ in the τ−→μ−¯νμντ decay using the full data sample of 988 fb−1 collected by the Belle detector operating at the KEKB asymmetric energy e+e− collider. The method is based on the reconstruction of the μ−→e−¯νeνμ decay-in-flight in the Belle central drift chamber and relies on the correlation between muon spin and its daughter electron momentum. We ...
Added: September 17, 2023
D. Bodrov, P. Pakhlov, Adachi I. et al., Physical Review Letters 2023 Vol. 131 No. 2 Article 021801
We report the first measurement of the Michel parameter ξ′ in the τ−→μ−¯νμντ decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ−→μ−¯νμντevents with subsequent muon decay in flight in the Belle central drift chamber. The analyzed data sample of 988 fb−1 collected by the Belle detector corresponds to approximately 912×106 τ+τ−pairs. We measure ξ′=0.22±0.94(stat)±0.42(syst), which is in ...
Added: September 17, 2023