$A$-dependence of coherent electroproduction of $ρ^{0}$ mesons on nuclei in forward direction

Details $A$-dependence of coherent electroproduction of $ρ^{0}$ mesons on nuclei in forward direction $A$-dependence of coherent electroproduction of $ρ^{0}$ mesons on nuclei in forward direction

2007-07-24

arxiv.org/abs/0707.3530v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

This article presents the $A$-dependence of the differential cross section for the coherent electroproduction of vector mesons on nuclei in forward direction, at fixed values of longitudinal momentum transfer $q_{L}$. It is shown that such cross section has complicated behavior over the atomic mass number $A$ with local minimums and maximums. It is also shown that a ratio of the real to the imaginary parts of the forward coherent amplitude on nuclei $\alpha_{A} = \Re e{f_{A}} / \Im m{f_{A}}$ has breaking points at some values of $A$. Comparison of the behaviors of the normalized cross section $\Big(\frac{d\sigma}{d\Omega}\Big)_{A}\Big/\Big(\frac{d\sigma}{d\Omega}\Big)_{N}$ and $\alpha_{A}$ over $A$ shows that the location of minimums of the cross section are very close to the breaking points of $\alpha_{A}$.

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