Target Fragmentation of the Nucleon at High Energies

Details Target Fragmentation of the Nucleon at High Energies Target Fragmentation of the Nucleon at High Energies

1998-05-25

arxiv.org/abs/hep-ph/9805444v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, LaTex2e. Absorption in DIS revised. Talk given at the 6th International Workshop on Deep Inelastic Scatter

Scientific paper

We calculate target fragmentation in $p p \to n X$ and $\gamma p \to n X $ reactions in the meson cloud picture of the nucleon. The $p p \to n X$ reaction is used to fix the $pn\pi^+$ form factor for two different models. We take into account the possible destruction of the residual neutron by the projectile. Using the form factor from the hadronic reaction we calculate photoproduction and small $x_{Bj}$ electroproduction of forward neutrons at HERA. In photoproduction we observe about the same amount of absorption as in the hadronic reaction. For deep inelastic events ($Q^2>10$ GeV$^2$) screening is weaker but still present at large $Q^2$. The signature for this absorptive rescattering is a shift of the $d\sigma/dE_n$ distribution to higher neutron energies for photofragmentation.

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