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EPJ C - Particles and Fields
Particles and Fields
\n This email address is being protected from spambots. You need JavaScript enabled to view it. ), CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> Eur. Phys. J. C 11, 685-693
DOI 10.1007/s100529900203

Exclusive photoproduction of $\Phi$ on proton in the quark-diquark model

C. Carimalo1 - N. Arteaga-Romero2 - S. Ong3

1 LPNHE, IN2P3-CNRS, Universités Paris VI et VII, 4 Place Jussieu, 75252 Paris Cedex 05, France
2 Université Paris VI, 4 Place Jussieu, 75252 Paris Cedex 05, France
3 Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, 91406 Orsay Cedex, France

Received: 5 November 1998 / Revised version: 13 July 1999 / Published online: 3 November 1999

Abstract
We present predictions for exclusive photoproduction of a $\Phi$ meson on proton at large transfer, where we use a quark-diquark structure model for the proton. Extrapolation from our results to lower transfers is comparable in magnitude with available data in that range. This may support the diquark model in its ability to provide, for that process, an appropriate link between diffractive physics at low transfer and the standard semiperturbative approach of hard exclusive processes at very large transfer, in which the proton recovers its three-quark structure.

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