Legendre Expansions for Two-Hadron Reactions

Modern experimental facilities and detectors provide tremendous volumes~ of detailed data. For two-hadron reactions, they are usually presented~as a set of multiple panels,~$e.g.$, angular distributions at many particular~energies. Such presentations lose visuality, and their physical content may~be extracted only through some model-dependent treatment. Instead, we~suggest to use expansion into the Legendre series with a relatively small~number of essential coefficients. This approach was applied in several~experimental investigations and demonstrated~its higher visualization.~This talk presents some general properties of the~Legendre coefficients~ which allow one to extract physical information even without any~model-dependent assumptions.