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FPCP / Measurement of CPV in Bs->phiphi decays

In the Standard Model, flavour-changing neutral currents (FCNCs) are only allowed in higher order processes. The decay $B_s \to \phi\phi$ proceeds via a $\overline{b} \to \overline{s}s\overline{s}$ penguin transition, providing an excellent probe of new physics contributions entering into such transitions and $B_s^0 - \overline{B_s^0}$ mixing diagrams. This talk will elaborate on experimental challenges and the measurements of the CP-violating phase $\phi_s$ and triple product asymmetries in a tagged, time-dependent, angular analysis. Finally, it summarises the latest results of $B_s \to \phi\phi$ from LHCb.

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