4 research outputs found
Analysis of the vector and axialvector mesons with QCD sum rules
In this article, we study the vector and axialvector mesons with the
QCD sum rules, and make reasonable predictions for the masses and decay
constants, then calculate the leptonic decay widths. The present predictions
for the masses and decay constants can be confronted with the experimental data
in the future. We can also take the masses and decay constants as basic input
parameters and study other phenomenological quantities with the three-point
vacuum correlation functions via the QCD sum rules.Comment: 14 pages, 16 figure
Spectroscopy and Regge trajectories of heavy quarkonia and B c mesons
The mass spectra of charmonia, bottomonia and B_c mesons are calculated in
the framework of the QCD-motivated relativistic quark model based on the
quasipotential approach. The dynamics of heavy quarks and antiquarks is treated
fully relativistically without application of the nonrelativistic v^2/c^2
expansion. The known one-loop radiative corrections to the heavy quark
potential are taken into account perturbatively. The heavy quarkonium masses
are calculated up to rather high orbital and radial excitations (L=5, n_r=5).
On this basis the Regge trajectories are constructed both in the total angular
momentum J and radial quantum number n_r. It is found that the daughter
trajectories are almost linear and parallel, while parent trajectories exhibit
some nonlinearity in the low mass region. Such nonlinearity is most pronounced
for bottomonia and is only marginal for charmonia. The obtained results are
compared with the available experimental data, and a possible interpretation of
the new charmonium-like states above open charm production threshold is
discussed.Comment: 23 pages, 11 figure