Stringy Mass Squared Splittings Revisited
Abstract
An empirically successful mass formula derived long ago from hadronic string models is not explained by symmetries of the QCD lagrangian. Consider that M(rho)2-M(pi)2 = M(K*)2-M(K)2 to a few percent accuracy. We derive this and other equal spacing relations using chiral symmetry and a novel Z2 symmetry. We offer an interpretation of this Z2 symmetry as a manifestation of chiral anomalies in a gauge theory with an intrinsic cutoff.
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