65,846 research outputs found
A time series model of CDS sequences in complete genome
A time series model of CDS sequences in complete genome is proposed.
A map of DNA sequence to integer sequence is given. The correlation
dimensions and Hurst exponents of CDS sequences in complete genome of bacteria
are calculated. Using the average of correlation dimensions, some interesting
results are obtained.Comment: 11 pages with 4 figures and one table, Chaos, Solitons and Fractals
(2000)(to appear
The analysis of the charmonium-like states ,, , and according to its strong decay behaviors
Inspired by the newly observed state , we analyze the strong
decay behaviors of some charmonium-like states ,,
, and by the model. We carry out our
work based on the hypothesis that these states are all being the charmonium
systems. Our analysis indicates that charmonium state can be a good
candidate for and state is the possible assignment for
. Considering as the state, the decay behavior of
is inconsistent with the experimental data. So, we can not assign
as the charmonium state by present work. Besides, our
analysis imply that it is reasonable to assign and to be
the same state, . However, combining our analysis with that of
Zhou~\cite{ZhouZY}, we speculate that / might not be a pure
systems
Analysis of the strong coupling form factors of and in QCD sum rules
In this article, we study the strong interaction of the vertexes
and using the three-point QCD sum rules under two different dirac
structures. Considering the contributions of the vacuum condensates up to
dimension in the operation product expansion, the form factors of these
vertexes are calculated. Then, we fit the form factors into analytical
functions and extrapolate them into time-like regions, which giving the
coupling constant. Our analysis indicates that the coupling constant for these
two vertexes are and
.Comment: 6 figure
Strong coupling constants and radiative decays of the heavy tensor mesons
In this article, we analyze tensor-vector-pseudoscalar(TVP) type of vertices
, , ,
, , ,
, , and
, in the frame work of three point QCD sum rules.
According to these analysis, we calculate their strong form factors which are
used to fit into analytical functions of . Then, we obtain the strong
coupling constants by extrapolating these strong form factors into deep
time-like regions. As an application of this work, the coupling constants for
radiative decays of these heavy tensor mesons are also calculated at the point
of . With these coupling constants, we finally calculate the radiative
decay widths of these tensor mesons.Comment: arXiv admin note: text overlap with arXiv:1810.0597
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