# List of all observables

To display automatically generated tables with lists of all observables currently implemented in flavio, select a category below. See also the notes on conventions at the bottom of this page.

## Some general notes on conventions

• Unless noted explicitly, branching ratios and angular observables always imply a CP-average. For instance, charged $B$ decay modes are always written as $B^+ \to \ldots$, but what is meant is the average of the $B^+$ and the $B^-$ decay.
• For lepton flavour violating $B$ decays, no CP-average is made; e.g. the decay $B^-\to e^+\mu^-$ (B+->emu, sic) is distinct from $B^-\to\mu^+e^-$ (B+->mue) but its rate is equal to $B^+\to \mu^+e^-$ by CPT.
• “Binned branching ratio” refers to the $q^2$-integral of the differential branching ratio, which is a dimensionless number and which coincides with the total branching ratio if the bin spans the whole kinematic domain. “Binned differential branching ratio” refers instead to the binned branching ratio divided by the bin width, which has units of GeV$^{-2}$. This definition is frequently used by LHCb and has the advantage that it is easier to compare results in the same kinematic region but with different bin sizes.
• The conventions for $B\to V\ell^+\ell^-$ angular observables follow the ones used by LHCb, which differ from the ones used in many theory papers, e.g. for $A_\text{FB}$, $S_4$, $P_4^\prime$, $A_7$, $A_9$ (see e.g. arXiv:1506.03970).
• Lepton flavour $\ell$ always refers to an average of electron and muon modes.