https://doi.org/10.1140/epjc/s2005-02379-5
Theoretical Physics
Production of spin-3 mesons in diffractive DIS
1
INFN, Gruppo Collegato di Cosenza, Universitá della Calabria, Dipartimento di Fisica, Ponte Bucci, 31C, 87036, Arcavacata di Rende (CS), Italy
2
Sobolev Institute of Mathematics, Acad. Koptyug avenue, 4, 630090, Russia
* e-mail: igivanov@cs.infn.it
We calculate the amplitudes of J
PC
= 3- - meson production in diffractive DIS within the k
t-factorization approach, with particular attention paid to the 
meson. We find that at all Q
2 the production cross section is 2-5 times smaller than the 
production cross section, which is assumed to be a pure D-wave state. Studying 
and 
separately, we observe domination of 
in and domination of in and offer an explanation of this behavior in simple terms. We also find very strong contributions - sometimes even domination - of the s-channel helicity violating amplitudes. The typical color dipole sizes probed in production are shown to be larger than those in the ground state 
production, and the energy dependence of cross section turns out to be much flatter than the production cross section. All the conclusions about the relative behavior of the and mesons are numerically stable against variations of the input parameters.
© Springer-Verlag, 2005
