Exclusive photoproduction of charmed D * vector mesons, , or
DAPNIA/SPhN, CEA/Saclay, 91191, Gif-sur-Yvette Cedex, France
2 NSC Kharkov Institute of Physics and Technology, 61108, Kharkov, Ukraine
* e-mail: firstname.lastname@example.org
The spin structure of the matrix element for the reactions , where , are charmed baryons with spin 1/2, and D *(2010) is the vector charmed meson, can be parametrized, in collinear regime, in terms of three independent scalar amplitudes, which are functions of the photon energy , only. In the framework of an effective Lagrangian approach generalized to charm photoproduction, we calculate the energy dependence of the differential cross-section, the density matrix element of , , the asymmetry A z in the collision of circularly polarized photons with polarized nucleons, and the polarization of the produced Y c -hyperon, P z , in the collision of circularly polarized photons with unpolarized target. All these polarization observables either vanish or are large, in absolute value, with a smooth -dependence, and differ for and production.
© Società Italiana di Fisica and Springer-Verlag, 2004