August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【318】Measuring $\mathcal{B}(B^0\to K^{*0}\tau^+\tau^-)$ via the double-loop process $B^0 \to K^{*0}\tau^+\tau^-(\to \mu^+\mu^-)$

Aug 31, 2021, 6:30 PM
Room B

Room B

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK) Nuclear, Particle- & Astrophysics


Martin Andersson (Universitaet Zuerich (CH))


Recent measurements of $B$-meson decays show a consistent pattern of tensions between measured observables and Standard Model (SM) predictions. These tensions are referred to as the flavour anomalies. To understand the source of these anomalies, measurements of $b\to$$s\tau^{+}\tau^{-}$ processes are paramount, as many New Physics explanations favour enhancements in this mode. Of particular interest is the decay $B^0$$\to$$K^{*0}\tau^+\tau^-$. Reconstructing tau final states is however challenging and no measurement of $\mathcal{B}(B^0\to$$K^{*0}\tau^+\tau^-$) has been made to date. This talk/poster outlines a novel approach to measuring $\mathcal{B}(B^0\to K^{*0}\tau^+\tau^-)$ via the non-local double-loop process $B^0$$\to$$K^{*0}\tau^+\tau^-(\to$$\mu^+\mu^-)$. The analysis strategy is outlined, including the expected sensitivities to $\mathcal{B}(B^0$$\to$$K^{*0}\tau^+\tau^-)$ using this approach.

Primary authors

Martin Andersson (Universitaet Zuerich (CH)) Patrick Haworth Owen (Universitaet Zuerich (CH)) Eluned Anne Smith (Rheinisch Westfaelische Tech. Hoch. (DE))

Presentation materials