Spin Density Matrix Elements from diffractive $φ$ meson production at HERMES

Details Spin Density Matrix Elements from diffractive $φ$ meson production at HERMES Spin Density Matrix Elements from diffractive $φ$ meson production at HERMES

2008-08-05

arxiv.org/abs/0808.0669v4

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 4 figures, Proceedings of DIS 2008, London, UK, April 7-11, 2008;

Scientific paper

Exclusive production of $\phi$ mesons on hydrogen and deuterium targets is studied in the HERMES kinematic region $1 < Q^{2} < 7$ GeV$^2$ and $3.0 < W < 6.3$ GeV. Spin density matrix elements and their $Q^{2}$ and $t$ dependences are presented. These data are consistent with s-channel helicity conservation in exclusive $\phi$ meson production. No significant evidence for the contribution of unnatural-parity-exchange amplitudes is found.

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