Probing CP symmetry and weak phases with entangled double-strange baryons.

ABSTRACT: Though immensely successful, the standard model of particle physics does not offer any explanation as to why our Universe contains so much more matter than antimatter. A key to a dynamically generated matter-antimatter asymmetry is the existence of processes that violate the combined charge conjugation and parity (CP) symmetry¹. As such, precision tests of CP symmetry may be used to search for physics beyond the standard model. However, hadrons decay through an interplay of strong and weak processes, quantified in terms of relative phases between the amplitudes. Although previous experiments constructed CP observables that depend on both strong and weak phases, we present an approach where sequential two-body decays of entangled multi-strange baryon-antibaryon pairs provide a se

SUBMITTER: BESIII Collaboration 

PROVIDER: S-EPMC9159954 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature