We list model-independent searches for local $\mathit CP$ violation in phase-space distributions of multi-body decays.
Most of these searches divide phase space (Dalitz plot for 3-body decays, five-dimensional equivalent for 4-body decays) into bins, and perform a ${{\mathit \chi}^{2}}$ test comparing normalised yields ${{\mathit N}_{{i}}}$, ${{\overline{\mathit N}}_{{i}}}$ in $\mathit CP$-conjugate bin pairs ${{\mathit i}}$: ${{\mathit \chi}^{2}}$ = ${{\mathit \Sigma}_{{i}}}({{\mathit N}_{{i}}}$ $−$ ${{\mathit \alpha}}{{\overline{\mathit N}}_{{i}}})/{{\mathit \sigma}}({{\mathit N}_{{i}}}−{{\mathit \alpha}}{{\overline{\mathit N}}_{{i}}}$). The factor ${{\mathit \alpha}}$ = (${{\mathit \Sigma}_{{i}}}{{\mathit N}_{{i}}})/({{\mathit \Sigma}_{{i}}}{{\overline{\mathit N}}_{{i}}}$) removes the dependence on phase-space-integrated rate asymmetries. The result is used to obtain the probability (p-value) to obtain the measured ${{\mathit \chi}^{2}}$ or larger under the assumption of CP conservation [AUBERT 2008AO, BEDIAGA 2009 ]. Alternative methods obtain p-values from other test variables based on unbinned analyses [WILLIAMS 2011 , AAIJ 2014C]. Results can be combined using Fisher's method [MOSTELLER 1948 ].