3 research outputs found
Calculation of Long-Distance Effects in Exclusive Weak Radiative Decays of B-Mesons
We calculate the contribution of the weak annihilation to the decay amplitude by means of QCD sum rules using the photon
light-cone wave function. We find that this long-distance contribution amounts
to about 10\% of the leading short-distance effect in . On the other hand, weak annihilation is the dominant source of
the corresponding meson decays and according to our estimates, yields
branching ratios of for ,
for , and for
and for .Comment: 14 pages, Latex, two figures added as an uuencoded .ps fil
Magnetic dipole moment of the light tensor mesons in light cone QCD sum rules
The magnetic dipole moments of the light tensor mesons , and
strange tensor meson are calculated in the framework of
the light cone QCD sum rules. It is observed that the values of the magnetic
dipole moment for the charged tensor particles are considerably different from
zero. These values are very close to zero for the light neutral and
tensor mesons, while it has a small nonzero value for the neutral strange
tensor meson.Comment: 12 Pages and 1 Tabl