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- W4376988695 abstract "The GlueX experiment at Jefferson Lab studies photoproduction of mesons using linearly polarized $8.5,text{GeV}$ photons impinging on a hydrogen target which is contained within a detector with near-complete coverage for charged and neutral particles. We present measurements of spin-density matrix elements for the photoproduction of the vector meson $rho$(770). The statistical precision achieved exceeds that of previous experiments for polarized photoproduction in this energy range by orders of magnitude. We confirm a high degree of $s$-channel helicity conservation at small squared four-momentum transfer $t$ and are able to extract the $t$-dependence of natural and unnatural-parity exchange contributions to the production process in detail. We confirm the dominance of natural-parity exchange over the full $t$ range. We also find that helicity amplitudes in which the helicity of the incident photon and the photoproduced $rho(770)$ differ by two units are negligible for $-t<0.5,text{GeV}^{2}/c^{2}$." @default.
- W4376988695 created "2023-05-18" @default.
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