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arXiv · 0812.1899

Target mass and finite $t$ corrections to diffractive deeply inelastic scattering

J. Blümlein·D. Robaschik·B. Geyer
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Abstract

The quantum field theoretic treatment of inclusive deep--inelastic diffractive scattering given in a previous paper \cite{BGR2006} is discussed in detail using an equivalent formulation with the aim to derive a representation suitable for data analysis. We consider the off-cone twist--2 light-cone operators to derive the target mass and finite $t$ corrections to diffractive deep--inelastic scattering and deep--inelastic scattering. The corrections turn out to be at most proportional to $x |t|/Q^2, x M^2/Q^2, x = x_{\rm BJ} {\rm or} x_\PP$, which suggests an expansion in these parameters. Their contribution varies in size considering diffractive scattering or meson--exchange processes. Relations between different kinematic amplitudes which are determined by one and the same diffractive GPD or its moments are derived. In the limit $t, M^2 \to 0$ one obtains the results of \cite{Blumlein:2001xf} and \cite{Blumlein:2002fw}.

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J. Blümlein, D. Robaschik, B. Geyer. 2008-12-10. Target mass and finite $t$ corrections to diffractive deeply inelastic scattering. https://doi.org/10.1140/epjc%2Fs10052-009-0982-6

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