Nico Gubernari - Probing the Standard Model with rare B-Meson Decays

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• Nico Gubernari
• Friday 12 May 2023, 16:00-17:00
• Potter Room (B1.19).

If you have a question about this talk, please contact Rene Poncelet.

Zoom: https://maths-cam-ac-uk.zoom.us/j/95336793441?pwd=U2V6aHJ6RllROVBtYy9VZlFnVlhYZz09 Meeting ID: 953 3679 3441 Passcode: 888178

Abstract:

Rare B-meson decays are powerful probes to test the Standard Model (SM). Recent measurements of several observables in $b\to s \mu\mu$ transitions have shown tensions with the corresponding SM predictions. These tensions (together with other tensions not mentioned here) are called B-anomalies. I provide improved SM predictions for the exclusive rare processes $B \to K^{(∗)}\mu\mu$ and $B_s \to \phi \mu\mu$. My predictions have, for the first time, controllable systematic uncertainties due to the usage of a dispersive bound. Comparing my predictions within the SM to available experimental data, I find a large tension for $B \to K\mu\mu$. A model-independent analysis of potential effects beyond the SM yields results compatible with other approaches, which suggests the existence of new physics short-distance contributions.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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