Kudryavtsev V.A. (PNPI)
Extended superVirasoro symmetry for composite strings and quark degrees of freedom
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.