10.3204/DESY-PROC-2012-02/63
Anikin, I. V.
I. V.
Anikin
Besse, Adrien
Adrien
Besse
Ivanov, D. Yu.
D. Yu.
Ivanov
Pire, B.
B.
Pire
Szymanowski, L.
L.
Szymanowski
Wallon, S.
S.
Wallon
High Energy Exclusive Leptoproduction of the $\rho$-meson: Theory and Phenomenology.
Deutsches Elektronen-Synchrotron, DESY, Hamburg
2013
ConferencePaper
Physics
2013
en
Abstract
Proc. of DIS 2012, 497-500; DESY
AWe describe the hard leptoproduction of transversally polarized rho-meson,
up to twist~3 accuracy, including 2- and 3- particles Fock-states,
in the HERA kinematics of high center-of-mass energy. We first build
a model based on a simple approach to the unintegrated gluon density
(the parton impact factor) that we compare with H1 and ZEUS data for
the ratios of helicity amplitudes $T(\gamma^{*}_T \to \rho_T)/T(\gamma^{*}_L
\to \rho_L)$ and $T(\gamma^{*}_T \to \rho_L)/T(\gamma^{*}_L \to \rho_L)$
and get a good description of the data. We also show how saturation
effects can be included in this model by extending the dipole representation
of the scattering amplitude in coordinate space up to twist~3.
Proc. of DIS 2012, 497 - 500; DESY-PROC-2012-02; ISSN 1435-8077