Flavor models for B ¯ →d (∗)τ ν ¯ FLAVOR MODELS for B ¯ →d (∗)τ ν ¯ MARAT FREYTSIS, ZOLTAN LIGETI, and JOSHUA T. RUDERMAN

Marat Freytsis, Zoltan Ligeti, Joshua T. Ruderman

    Research output: Contribution to journalArticle


    The ratio of the measured B¯→D(∗)ν¯ decay rates for =τ vs e,μ deviate from the standard model (SM) by about 4σ. We show that the data are in tension with the SM, independent of form factor calculations, and we update the SM prediction for B(B→Xcτν¯)/B(B→Xcν¯). We classify the operators that can accommodate the measured central values, as well as their UV completions. We identify models with leptoquark mediators that are minimally flavor violating in the quark sector, and are minimally flavor violating or τ-aligned in the lepton sector. We explore experimental signatures of these scenarios, which are observable in the future at ATLAS/CMS, LHCb, or Belle II.

    Original languageEnglish (US)
    Article number054018
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Issue number5
    StatePublished - Sep 14 2015


    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Physics and Astronomy (miscellaneous)

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