EPJ

2021 Impact factor 4.991
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 8, 107-114
DOI 10.1007/s100529901049

Hard diffractive photon-proton scattering at large |t|

D.Yu. Ivanov1 - M. Wüsthoff2

1 Institute of Mathematics, 630090 Novosibirsk, Russia
2 University of Durham, Physics Department, South Rd., Durham DH1 3LE, UK

Received: 9 September 1998 / Revised version: 2 October 1998 / Published online: 14 January 1999

Abstract
We propose to test perturbative QCD(pQCD) in the Regge limit by means of diffractive photon scattering, $\gamma p \to \gamma X$, at large |t| and very high energies, $W^2\gg \vert t\vert\gg \Lambda^2_{QCD}$. The helicity amplitudes of this process were calculated using the Lipatov solution of the BFKL equation for $t\neq 0$. We found that the perturbatively calculated cross section for this process is comparable in magnitude to the cross section for $J/\Psi$ photoproduction assuming similar kinematics.

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