A Hilbert series construction yields the complete four-meson, two-derivative operator basis with CKM spurions, from which all leading-order B to pseudoscalar decay sum rules follow as null vectors.
Amplitude relations for $B$ decays involving $\eta$ and $\eta'$
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abstract
A class of amplitude relations for decays of $B$ mesons is discussed. Processes involving $\eta$ and $\eta'$ in the final state are shown to provide useful information about weak phases in some cases even in the presence of octet-singlet mixing in these states. Some of the relations are unaffected by first-order SU(3) breaking.
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Hilbert Series of Pseudoscalar Mesons: Operators and Sum Rules
A Hilbert series construction yields the complete four-meson, two-derivative operator basis with CKM spurions, from which all leading-order B to pseudoscalar decay sum rules follow as null vectors.