Vector meson photoproduction at high-$t$ and comparison to HERA data

J.R. Forshaw; G. Poludniowski

doi:doi:10.1140/epjc/s2002-01078-1

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2023 Impact factor 4.2

Particles and Fields

Eur. Phys. J. C 26, 411-415 (2003)
DOI: 10.1140/epjc/s2002-01078-1

Vector meson photoproduction at high- t and comparison to HERA data

J.R. Forshaw and G. Poludniowski

Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK

(Received: 23 May 2002 / Published online: 9 December 2002)

Abstract
We explore QCD calculations for the process $\gamma p\rightarrow VX$ where V is a vector meson, in the region $s\gg -t$ and $-t\gg \Lambda _{QCD}^{2}$ . We compare our calculations for the $J/\psi$ , $\phi$ and $\rho$ mesons with data from the ZEUS Collaboration at HERA and demonstrate that the BFKL approach is consistent with the data even for light mesons, whereas the two-gluon exchange approach is inadequate. We also predict the differential cross-sections for the $\Upsilon$ and $\omega$ for which no data are currently available.