Eur. Phys. J. C 19, 361-372
DOI: 10.1007/s100520100603
New shapes of light-cone distributions
of the transversely polarized
-mesons
A.P. Bakulev and S.V. Mikhailov Bogolyubov Lab. of Theoretical Physics, Joint Institute for Nuclear Research, 141980, Moscow Region, Dubna, Russia
(Received: 20 October 2000 / Published online: 15 March 2001 -© Springer-Verlag 2001)
Abstract
The leading twist light-cone distributions for
transversely polarized -,
- and b1-mesons
are re-analyzed in the framework of QCD sum rules
with nonlocal condensates.
Using different kinds of sum rules to obtain reliable predictions,
we estimate the 2nd, 4th, 6th and 8th moments for transversely
polarized
- and
-meson distributions and re-estimate
the
tensor couplings
.
We stress that the results of the standard sum rules also support
our
estimate of the second moment of the transversely polarized
-meson distribution.
New models for light-cone distributions of these mesons are
constructed. Phenomenological consequences of these distributions
are briefly discussed.
Our results are compared with those found by Ball and Braun in
1996,
and the latter are shown to be incomplete.
© Società Italiana di Fisica, Springer-Verlag 2001