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Kudryavtsev V.A. (PNPI)
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Extended superVirasoro symmetry for composite strings and quark degrees of freedom
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New superconformal generators of Virasoro algebra in addition to usual superVirasoro generators for composite
strings are considered. Quark spin degrees of freedom are
proved to be necessary for consistency of this extended
superVirasoro algebra. Amplitudes and vertices for interacting pions and kaons in this picture are discussed.