A mechanism for the Double-Spin Asymmetry in Electromagnetic $ρ$ Production at HERMES

Details A mechanism for the Double-Spin Asymmetry in Electromagnetic $ρ$ Production at HERMES A mechanism for the Double-Spin Asymmetry in Electromagnetic $ρ$ Production at HERMES

2001-12-21

arxiv.org/abs/hep-ph/0112292v2

Phys.Rev. D65 (2002) 097504

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures, Latex

Scientific paper

10.1103/PhysRevD.65.097504

We calculate the contribution of meson and pomeron exchanges to the
double-spin asymmetry in $\rho$-meson electromagnetic production at HERMES
energies. We show that the observed double-spin asymmetries, which are large,
can be explained by the interference between the natural parity $f_2$-secondary
Reggeon and the unnatural parity anomalous $f_1$ exchanges.

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