Abstract
Using a model previously introduced to describe spin-spin asymmetries in large angle elastic proton-proton scattering, we have computed the helicity density matrix of ρ vector mesons produced in πp→ρp interactions, at 90° in the c.m. system. Contrary to most other schemes, we obtain some nondiagonal elements sizeably different from zero; when comparing the ρ− decay angular distribution with experimental data we have an excellent agreement. We also give predictions for the case of ρ+ production.
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The right hand sides of (13b) in the first of Refs. 8 should be replaced byM ′1 andM ′2 of our (9) correspondingly. All other formulae and numerical results of Refs. 8 do not change
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Anselmino, M., Predazzi, E. Spin effects in large angle πp→ρp interactions. Z. Phys. C - Particles and Fields 29, 541–546 (1985). https://doi.org/10.1007/BF01560288
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DOI: https://doi.org/10.1007/BF01560288