4,424 research outputs found
Determination of the -- mixing angle from QCD sum rules
The -- mixing angle is calculated in framework of the QCD
sum rules. We find that our prediction for the mixing angle is which is in good agreement with the quark model prediction, and
approximately two times larger than the recent lattice QCD calculations.Comment: 5 pages, no figures, LaTeX formatte
Study of the decay in light cone sum rules
The form factors of the decay are
calculated in the framework of the light cone QCD sum rules. In the
calculations the contribution of the negative parity baryon is
eliminated by constructing the sum rules for different Lorentz structures.
Furthermore the branching ratio of the semileptonic decay is calculated. The numerical study for the branching ratio
of the decay indicates that it is quite
large and could be measurable at future planned experiments to be conducted at
LHCb.Comment: 21 pages, 2 figures, LaTeX formatte
Magnetic dipole moments of the heavy tensor mesons in QCD
The magnetic dipole moments of the , and , , and heavy tensor mesons are estimated in framework of
the light cone QCD sum rules. It is observed that the magnetic dipole moments
for the charged mesons are larger than that of its neutral counterpart. It is
found that the flavor symmetry violation is about 10\% in both and
sectors.Comment: 16 pages, 6 figures, LaTeX formatte
Radiative decays of the p-wave charmed heavy baryons
The radiative decays of the p-wave charmed heavy baryons to the ground state
baryon states are studied in the framework of the light cone QCD sum rules
method. Firstly, the transition form factors that describe these transitions
are estimated, and then using these form factors the corresponding decay widths
are calculated. A comparison of our results on the decay widths with those
predicted by the other approaches existing in literature is performed
Analysis of the radiative decays and in light cone sum rules
The light cone sum rules method is used in studying the radiative decays
and . Firstly,
the sum rules for the form factor responsible for these
transitions is constructed. Using this result the decay widths of the
above--mentioned decays are calculated and analyzed. A comparison of our
predictions on the decay widths of considered transitions with the predictions
of the other approaches is presented.Comment: 13 pages, no figures, LaTeX formatte
Diagonal and transition magnetic moments of negative parity heavy baryons in QCD sum rules
Diagonal and transition magnetic moments of the negative parity, spin-1/2
heavy baryons are studied in framework of the light cone QCD sum rules. By
constructing the sum rules for different Lorentz structures, the unwanted
contributions coming from negative (positive) to positive (negative) parity
transitions are removed. It is obtained that the magnetic moments of all
baryons, except , and , are quite
large. It is also found that the transition magnetic moments between neutral
negative parity heavy and baryons are very small.
Magnetic moments of the and transitions are quite large and can be measured in further
experiments.Comment: 31 pages, 4 figures, LaTeX formatted. arXiv admin note: substantial
text overlap with arXiv:1504.00172, arXiv:1504.0818
- …