Alternative theories of CP violation

Riccardo Barbieri, Lawrence Hall, Achille Stocchie, Neal Weiner

    Research output: Contribution to journalArticlepeer-review


    Recent improvements to the limit of ΔMBs imply that pure superweak theories, while not excluded, no longer provide a good fit to the data. A class of general superweak theories is introduced in which all flavor changing interactions are governed by an approximate flavor symmetry which gives a "3 mechanism". These theories are in good agreement with data, and predict low values for |Vtd|, |Vub/Vcb|, B(K+ → π+̄v), ∈′/∈ and CP asymmetries in B decays, and high values for ΔMBs and fB√BB. An important example of such a theory is provided by weak scale supersymmetric theories with soft CP violation. The CP violation originates in the squark mass matrix, and, with phases of order unity, flavor symmetries can yield a correct prediction for the order of magnitude of ∈K.

    Original languageEnglish (US)
    Pages (from-to)119-125
    Number of pages7
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Issue number1-2
    StatePublished - Apr 16 1998

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


    Dive into the research topics of 'Alternative theories of CP violation'. Together they form a unique fingerprint.

    Cite this