Experimental determination of the complete spin structure for p¯p→Λ¯Λ at pp¯=1.637GeV/c
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ID: 271034
2006
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Abstract
The reaction $\overline{p}p\ensuremath{\rightarrow}\overline{\ensuremath{\Lambda}}\ensuremath{\Lambda}\ensuremath{\rightarrow}\overline{p}{\ensuremath{\pi}}^{+}p{\ensuremath{\pi}}^{\ensuremath{-}}$ has been measured with high statistics at a beam momentum of ${p}_{\overline{p}}=1.637\mathrm{GeV}/c$. The use of a transversely polarized frozen-spin target combined with the self-analyzing property of $\ensuremath{\Lambda}/\overline{\ensuremath{\Lambda}}$ decay allows access to unprecedented information on the spin structure of the interaction. The most general spin-scattering matrix can be written in terms of 11 real parameters for each bin of scattering angle; each of these parameters is determined with reasonable precision. From these results, all conceivable spin correlations are determined with inherent self-consistency. Good agreement is found with the few previously existing measurements of spin observables in $\overline{p}p\ensuremath{\rightarrow}\overline{\ensuremath{\Lambda}}\ensuremath{\Lambda}$ near this energy. Existing theoretical models do not give good predictions for those spin observables that had not been previously measured.
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2006physicalexperimental
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| Journal | physical review c |
| Year | 2006 |
| DOI |
doi:10.1103/PhysRevC.74.015206
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