$S$ -matrix unitarity and renormalizability in higher-derivative theories
Sign Up to like & getrecommendations! Published in 2019 at "Progress of Theoretical and Experimental Physics"
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
Roadmap to Thermal Dark Matter beyond the Weakly Interacting Dark Matter Unitarity Bound.
Sign Up to like & getrecommendations! Published in 2023 at "Physical review letters"
DOI: 10.1103/physrevlett.130.171001
Abstract: We study the general properties of the freeze-out of a thermal relic. We give analytic estimates of the relic abundance for an arbitrary freeze-out process, showing when instantaneous freeze-out is appropriate and how it can… read more here.
Keywords: matter; unitarity bound; dark matter; freeze ... See more keywords