Baryonic B Decays Chistov, R
Journal of physics. Conference series,
01/2016, Letnik:
675, Številka:
2
Journal Article
Recenzirano
Odprti dostop
In this talk the decays of B-mesons into baryons are discussed. Large mass of B-meson makes possible the decays of the type B → baryon (+mesons). Experimental observations and measurements of these ...decays at B-factories Belle and BaBar have stimulate the development of theoretical models in this field. We briefly review the experimental results together with the current theoretical models which describe baryonic B decays.
A review of the results obtained in the CMS experiment from searches for new multiquark states is given. Attention is paid primarily to searches for four-quark states (tetraquarks) containing heavy
...quarks.
Charm Baryon Spectroscopy Chistov, R
Journal of physics. Conference series,
01/2016, Letnik:
675, Številka:
2
Journal Article
Recenzirano
Odprti dostop
B-factories Belle and BaBar during its operation made not only measurements connected with B-meson decays but also numerous observation and measurements in charm physics. In particular, their results ...on charm baryon decays and spectroscopy have enlarged and enriched the current picture of heavy flavour hadrons. In this talk we overview current status of charm baryons and their excited states.
Semileptonic decays of the
meson to certain excited states of the
meson in the CMS experiment at the Large Hadron Collider (LHC) are analyzed. The technique for reconstructing signals without ...identification of charged tracks in events is developed, its operability is successfully tested on the data on proton—proton collisions at the center-of-mass energy
TeV. It can be used later, in particular, to measure the probabilities of the decays under study.
Study of Meson Sources on CMS Experiment Data Andreev, I. A.; Ivanov, K. M.; Chistov, R. N.
Bulletin of the Lebedev Physics Institute,
2023/1, Letnik:
50, Številka:
1
Journal Article
Recenzirano
The paper is dedicated to the search for sources of
mesons production, using the data sample collected by the CMS experiment at the LHC in proton–proton collision at
= 13 TeV (corresponding to an ...integrated luminosity 60 fb-1) in 2018. Two possible sources were considered:
mesons produced in the primary vertex and
mesons produced in semileptonic decays
. It was found that both sources in total provide more than 3.5 millions of
mesons reconstructed in the
channel. The obtained results open up the possibility for the following search for rare decays of
mesonов, in particular, for a search for a heavy sterile neutrino in the
decay.
This study concerns the experimental situation in the range of baryon decays of
B
mesons. The basic properties of these decays and theoretical models explaining these properties are discussed. The ...emphasis is on baryon decays of
B
mesons with
J
/ψ in the final state, which facilitate the search for exotic resonant states in the
J
/ψ + baryon system.
We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| using the decay B → Dℓνℓ (ℓ = e,μ) based on 711 fb–1 of e+e– → Υ(4S) data recorded by the Belle ...detector and containing 772 × 106 BB¯ pairs. Here, one B meson in the event is fully reconstructed in a hadronic decay mode, while the other, on the signal side, is partially reconstructed from a charged lepton and either a D+ or D0 meson in a total of 23 hadronic decay modes. The isospin-averaged branching fraction of the decay B → Dℓνℓ is found to be B(B0 → D–ℓ+νℓ) = (2.31 ± 0.03(stat) ± 0.11(syst))%. Analyzing the differential decay rate as a function of the hadronic recoil with the parametrization of Caprini, Lellouch, and Neubert and using the form-factor prediction G(1) = 1.0541 ± 0.0083 calculated by FNAL/MILC, we obtain ηEW|Vcb| = (40.12 ± 1.34) × 10–3, where ηEW is the electroweak correction factor. Alternatively, assuming the model-independent form-factor parametrization of Boyd, Grinstein, and Lebed and using lattice QCD data from the FNAL/MILC and HPQCD collaborations, we find ηEW|Vcb| = (41.10 ± 1.14) × 10–3.
This paper presents the results of research on the treatment of secondary wood fibre semi-finished materials using a dry-grinding-type rotary cutting mill and the possibility of their use in finished ...products for various purposes. The physical phenomena, processes, and regularities of the treatment of secondary wood fibre materials in dry processing conditions were determined and evaluated. The influence of grinding plant design parameters on wood fibre quality indices was evaluated. Mechanical effects on wood fibre waste of face-cross cutting (cutting, crumpling, collapsing, and breaking) and the dry grinding environment (breaking, collision, defibering, and fibrillation) was studied. These phenomena contribute to the formation of external and internal fibrillation of secondary wood fibre and an increase in the specific surface area. This is achieved in the absence of high temperatures and pressure, in the absence of chemical additives, and without the application of water and vapour. The effectiveness of secondary wood fibre semi-finished material treatment was demonstrated under dry processing conditions, thus confirming the environmental and economic feasibility of this method.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
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