231 research outputs found
Strategic Cooperation of Ukrainian Industrial Enterprises to Create Competitive Advantages in the World Market
Competitive advantages in the market can be accumulated both with the use of the mechanism of cooperation, and as a result of coordination in the interregional sphere. The relevance of the study is determined primarily by the fact that cooperation between organisations allows to increase competitiveness in the foreign market. However, this gives rise to a contradiction that determines that cooperation between companies is possible only if the conglomerate or certain entities own controlling shares. With that, companies should not only constitute holding structures, but primarily be co-operators in the production cycle. The novelty of the study is determined by the fact that strategic cooperation is proposed to be considered not only as a set of practical actions on the part of the state or regulatory structures, but also of consulting bodies. It is proposed to use the mechanisms of strategic cooperation based on mutual conditionality of interests and security of budgetary mechanisms that allow for practical activities. The authors also admit the possibility of the use of public-private partnership mechanisms. The practical significance of the study is determined by the fact that each of the participants in the organisation of strategic management of enterprises can use not only strategic, but financial and systemic interaction mechanisms to form
B-flavor tagging at Belle II
We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ( ) mesons at Belle II. The algorithms provide essential inputs for measurements of quark-flavor mixing and charge-parity violation. We validate and evaluate the performance of the algorithms using hadronic decays with flavor-specific final states reconstructed in a data set corresponding to an integrated luminosity of 62.8 fb−1
, collected at the resonance with the Belle II detector at the SuperKEKB collider. We measure the total effective tagging efficiency to be
εeff=(30.0±1.2(stat)±0.4(syst))%
for a category-based algorithm and
εeff=(28.8±1.2(stat)±0.4(syst))%
for a deep-learning-based algorithm
Search for the lepton flavour violating decays () at Belle
We present a search for the lepton-flavour-violating decays , with , using the full data sample of pairs recorded by the Belle detector at the KEKB
asymmetric-energy collider. We use events in which one meson is
fully reconstructed in a hadronic decay mode. We find no evidence for decays and set upper limits on their branching fractions
at the 90% confidence level in the - range. The obtained
limits are the world's best results.Comment: 14 pages, 6 figure
Measurement of the branching fraction of at Belle
Based on a data sample of 983 fb collected with the Belle detector at
the KEKB asymmetric-energy collider, we present the study of the
heavy-flavor-conserving decay with
reconstructed via its decay mode. The
branching fraction ratio is measured
to be . Combing with the world average value of
, the branching fraction
is deduced to be . Here, the uncertainties above are statistical,
systematic, and from , respectively.Comment: 5 pages, 4 figure
Measurement of Angular Coefficients of : Implications for and Tests of Lepton Flavor Universality
We measure the complete set of angular coefficients for exclusive
decays (). Our analysis
uses the full Belle data set with hadronic tag-side
reconstruction. The results allow us to extract the form factors describing the
transition and the Cabibbo-Kobayashi-Maskawa matrix element
. Using recent lattice QCD calculations for the hadronic form
factors, we find using the BGL
parameterization, compatible with determinations from inclusive semileptonic
decays. We search for lepton flavor universality violation as a function of the
hadronic recoil parameter , and investigate the differences of the electron
and muon angular distributions. We find no deviation from Standard Model
expectations
Search for at Belle
We present a search for the decay in the
data sample collected at the
Belle detector, where the is produced in
and decays. We do not observe a signal, and set 90\%
credible upper limits for two different models of the decay processes: if the
decay products are distributed uniformly in phase space, ; if is concentrated near the mass
of the pair in the process ,
Search for lepton-flavor-violating decays into a lepton and a vector meson using the full Belle data sample
Charged-lepton-flavor-violation is predicted in several new physics
scenarios. We update the analysis of lepton decays into a light charged
lepton ( = or ) and a vector meson ( =
, , , , or ) using 980
fb of data collected with the Belle detector at the KEKB collider. No
significant excess of such signal events is observed, and thus 90% credibility
level upper limits are set on the branching
fractions in the range of (1.7--. These limits are
improved by 30% on average from the previous results.Comment: 19 pages, 5 figures; added one sentence in Acknowledgments; added a
systematic uncertainty about the number of background estimation, and
corrected some sentence
Two-particle angular correlations in collisions to hadronic final states in two reference coordinates at Belle
We present the analysis of two-particle angular correlations using coordinate
systems defined with the conventional beam axis and the event thrust axis, and
propose the latter to be a useful representation for the correlation structure
interpretation in the collision system. The collisions to
hadronic final states at center-of-mass energies of GeV and
GeV are recorded by the Belle detector at KEKB. In this paper, results
on the first dataset are supplementary to the previous Belle publication
arXiv:2201.01694 while the latter one is the first two-particle correlation
measurement at a collision energy on the resonance and sensitive
to its decay products. Measurements are reported as a function of the
charged-particle multiplicity. Finally, a qualitative understanding of the
correlation structure is discussed using a combination of Monte Carlo
simulations and experimental data.Comment: Submitted to JHEP. 32 pages, 14 figure
Measurement of Two-Particle Correlations of Hadrons in e⁺ e⁻ Collisions at Belle
The measurement of two-particle angular correlation functions in high-multiplicity e+e− collisions at √s=10.52 GeV is reported. In this study, the 89.5 fb−1 of hadronic e+e− annihilation data collected by the Belle detector at KEKB are used. Two-particle angular correlation functions are measured in the full relative azimuthal angle (Δϕ) and three units of pseudorapidity (Δη), defined by either the electron beam axis or the event-shape thrust axis, and are studied as a function of charged-particle multiplicity. The measurement in the thrust axis analysis, with mostly outgoing quark pairs determining the reference axis, is sensitive to the region of additional soft gluon emissions. No significant anisotropic collective behavior is observed with either coordinate analyses. Near-side jet correlations appear to be absent in the thrust axis analysis. The measurements are compared to predictions from various event generators and are expected to provide new constraints to the phenomenological models in the low-energy regime
- …