1,253 research outputs found
Spectrum of linearized operator at ground states of a system of Klein-Gordon equations
Previously, the existence of ground state solutions of a family of systems of
Klein-Gordon equations has been widely studied. In this article, we will study
the linearized operator at the ground state and give a complete description of
the spectrum for this operator in the radial case: the existence of a unique
negative eigenvalue, no resonance at '1'(the bottom of the essential spectrum),
no embedded eigenvalue in the essential spectrum and the spectral gap property
(i.e., there is no eigenvalue in the interval (0,1])
Contributions of and in the charmed three-body meson decays
In this work, we investigate the resonant contributions of and
in the three-body within the
perturbative QCD approach. The form factor are adopted to
describe the nonperturbative dynamics of the S-wave system. The
branching ratios of all concerned decays are calculated and predicted to be in
the order of to . The ratio of branching fractions
between and are predicted to be
0.0552, which implies the discrepancy for the LHCb measurements. We expect that
the predictions in this work can be tested by the future experiments,
especially, to resolve ratio discrepancy
Construction and evaluation of controlled-release delivery system of Abamectin using porous silica nanoparticles as carriers
TetraÂaquaÂbis(3-carboxylÂatopyridine N-oxide-κO 3)cadmium(II)
In the title complex, [Cd(C6H4NO3)2(H2O)4], the CdII atom is situated on a crystallographic centre of inversion. The CdII atom shows a slightly distorted octaÂhedral geometry and is coordinated by four O atoms from water molÂecules and two O atoms from deprotonated carboxyl groups of nicotinic acid N-oxide ligands. The mononuclear complex molÂecules are linked by O—H⋯O hydrogen bonds, forming a three-dimensional network structure
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