252 research outputs found
Dynamical origin and the pole structure of X(3872)
The dynamical mechanism of channel coupling with the decay channels is
applied to the case of coupled charmonium - states with .
A pole analysis is done and the production cross section is calculated
in qualitative agreement with experiment. The sharp peak at the
threshold and flat background are shown to be due to Breit-Wigner resonance,
shifted by channel coupling from the original position of 3954 MeV for the
, state. A similar analysis, applied to the , ,
, , allows us to associate the first one with the observed
J=2 and explains the destiny of .Comment: 5 pages, 4 figures. Accepted for publication in Phys. Rev. Let
The Hyperfine Splittings in Bottomonium and the Mesons
A universal description of the hyperfine splittings (HFS) in bottomonium and
the mesons is obtained with a universal strong coupling
constant in a spin-spin potential. Other
characteristics are calculated within the Field Correlator Method, taking the
freezing value of the strong coupling independent of . The HFS MeV, MeV are obtained in full
agreement with experiment both for and . In bottomonium,
MeV for agrees with the BaBar
data, while a smaller HFS, equal to 64(1) MeV, is obtained for . We
predict HFS MeV, MeV, and MeV, which gives
MeV, MeV, and MeV.Comment: 5 pages revtex
The possibility of Z(4430) resonance structure description in reaction
The possible description of Z(4430) as a pseudoresonance structure in reaction, is considered. The analysis is performed with
single-scattering contribution to elastic scattering via
intermediate energy.Comment: 3 pages, 4 figure
Large eddy simulation of turbulent flow and of pollutant transport in a street canyon
The work presents a non-steady three-dimensional eddy resolving model intended for the simulation of non-isothermal turbulent separation flows in street canyons. For a subgrid-scale turbulence parameterization, the Smagorinsky gradient model is used. The calculation results demonstrate the effects of pollutant source location, street canyon size, basic stream rate and wall temperature difference on air pollution in the canyon. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only
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