$S$ -matrix unitarity and renormalizability in higher-derivative theories
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DOI: 10.1093/ptep/ptz084
Abstract: We investigate the relation between $S$-matrix unitarity ($SS^\dagger=1$) and renormalizability in theories with negative-norm states. The relation has been confirmed in many field theories, including gauge theories and Einstein gravity, by analyzing the unitarity bound,… read more here.
Keywords: matrix unitarity; unitarity renormalizability; unitarity bound; unitarity ... See more keywords