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Given existing empirical spectral patterns of excited hadrons it has beensuggested that chiral symmetry is approximately restored in excited hadrons atzero temperature/density (effective symmetry restoration). If correct, thisimplies that mass generation mechanisms and physics in excited hadrons is verydifferent as compared to the lowest states. One needs an alternative andindependent experimental information to confirm this conjecture. Using verygeneral chiral symmetry arguments it is shown that strict chiral restoration ina given excited nucleon forbids its decay into the N \pi channel. Hence thoseexcited nucleons which are assumed from the spectroscopic patterns to be inapproximate chiral multiplets must only "weakly" decay into the N \pi channel,(f_{N^*N\pi}/f_{NN\pi})^2 << 1. However, those baryons which have no chiralpartner must decay strongly with a decay constant comparable with f_{NN\pi}.Decay constants can be extracted from the existing decay widths and branchingratios. It turnes out that for all those well established excited nucleonswhich can be classified into chiral doublets N_+(1440) - N_-(1535), N_+(1710) -N_-(1650), N_+(1720) - N_-(1700), N_+(1680) - N_-(1675), N_+(2220) - N_-(2250),N_+(?) - N_-(2190), N_+(?) - N_-(2600), the ratio is (f_{N^*N\pi}/f_{NN\pi})^2~ 0.1 or much smaller for the high-spin states. In contrast, the only wellestablished excited nucleon for which the chiral partner cannot be identifiedfrom the spectroscopic data, N(1520), has a decay constant into the N\pichannel that is comparable with f_{NN\pi}. This gives an independentexperimental verification of the chiral symmetry restoration scenario.

Alternative experimental evidence for chiral restoration in excited baryons