4,203 research outputs found
Semileptonic transitions in QCD
The form factors relevant to
decays are calculated in the framework of the three point QCD sum
rules approach. The heavy quark effective theory prediction of the form factors
are obtained. The total decay width and branching ratio for these decays are
also evaluated using the dependencies of these form factors.Comment: 4 pages, 4 figures and 3 tables. To be published in the proceedings
of the 14th International QCD Conference (QCD 08), Montpellier, France, 7-12
July 200
The masses and residues of doubly heavy spin--3/2 baryons
The masses and residues of the spin--3/2 doubly heavy baryons are calculated
within the QCD sum rules method. A comparison of our predictions with those
existing in the literature is also made.Comment: 11 Pages and 4 Table
Analysis of rare (B -> K_0*(1430) l^+ l^- decay) within QCD sum rules
Form factors of rare (B -> K_0*(1430) l^+ l^- decay) can
give valuable information about the nature of scalar meson (K_0* (1430)).Comment: 13 pages, 1 figur
Masses and Residues of the Triply Heavy Spin-1/2 Baryons
We calculate the masses and residues of the triply heavy spin--1/2 baryons
using the most general form of their interpolating currents within the QCD sum
rules method. We compare the obtained results with the existing theoretical
predictions in the literature.Comment: 9 Pages and 3 Table
Magnetic moments of - transitions in light cone QCD
The - transition magnetic moments are calculated in
framework of the light cone QCD sum rules method (LCSR). The values of the
transition magnetic moments obtained are compared with the predictions of the
other theoretical approaches.Comment: 11 pages, 4 figures, LaTeX formatte
Vertices of the heavy spin-3/2 sextet baryons with light vector mesons in QCD
All transitions among the heavy spin--3/2 sextet baryons with participation
of the light vector mesons are investigated in the framework of
the light cone sum rules. These vertices are described by four coupling
constants. The corresponding sum rules are derived for each coupling constant.
It is shown that the correlation functions of different transitions can be
described by only one invariant function.Comment: 12 Pages, 4 Figures and 3 Table
Properties of triply heavy spin--3/2 baryons
The masses and residues of the triply heavy spin--3/2 baryons are calculated
in framework of the QCD sum rule approach. The obtained results are compared
with the existing theoretical predictions in the literature.Comment: 13 Pages, 2 Figures and 4 Tables, To be appear in Journal of Physics
G: Nuclear and Particle Physic
Double-Lepton Polarization Asymmetries and Polarized Forward Backward Asymmetries in the Rare b \to s \ell^+ \ell^- Decays in a Single Universal Extra Dimension Scenario
We study the double-lepton polarization asymmetries and single and
double-lepton polarization forward backward asymmetries of the rare b \to s
\ell^+ \ell^- mode within the Standard Model and in the
Appelquist-Cheng-Dobrescu model, which is a new physics scenario with a single
universal extra dimension. In particular, we examine the sensitivity of the
observables to the radius R of the compactified extra-dimension, which is the
new parameter in this new physics model.Comment: 20 Pages, 15 Figures and 1 Tabl
- …