22-26 January 2018
Bormio, Italy
Europe/Berlin timezone

Study of rare B decays at BABAR

24 Jan 2018, 17:25
Bormio, Italy

Bormio, Italy

Short Contribution Wednesday Afternoon


Prof. Wolfgang Gradl (Universität Mainz)


Flavour-changing neutral currents, such as $B \to K^{(*)} \ell^+\ell^-$ or $B \to X_s \gamma$, are forbidden at tree level in the Standard Model. At lowest order, they occur at 1-loop level, making them sensitive to quantum corrections from particles beyond the Standard Model (SM). Via these virtual contributions, one can probe mass scales which are currently inaccessible in direct production. In this talk, we present the most recent results from BABAR, using 471 million $B\bar{B}$ pairs, on the decays $B \to K^* \ell^+\ell^-$. The quantities $A_{FB}$ and $F_L$, which are sensitive to the presence of particles beyond the SM in the loops, are determined using an angular analysis. We also report on a search for the decay $B \to K \tau^+ \tau^-$.

Primary author

Prof. Wolfgang Gradl (Universität Mainz)

Presentation Materials

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