pdgLive Home   >   TESTS OF DISCRETE SPACE-TIME SYMMETRIES  >   $\mathit CP$ INVARIANCE   >   ${{\overline{\mathit A}}}_{CP}$( ${{\mathit B}}$ $\rightarrow$ ${{\mathit K}^{*}}{{\mathit \gamma}}$ ) = ($\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{*+}}{{\mathit \gamma}}$ ) + $\mathit A_{CP}$( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}^{*0}}{{\mathit \gamma}}$ ))/2

$\mathit CP$ VIOLATION

$\mathit A_{CP}$ is defined as
${B( {{\overline{\mathit B}}} \rightarrow {{\overline{\mathit f}}} )–B( {{\mathit B}} \rightarrow {{\mathit f}} )\over B( {{\overline{\mathit B}}} \rightarrow {{\overline{\mathit f}}} )+B( {{\mathit B}} \rightarrow {{\mathit f}} )}$,
the $\mathit CP$-violation charge asymmetry of inclusive ${{\mathit B}^{\pm}}$ and ${{\mathit B}^{0}}$ decay.

${{\overline{\mathit A}}}_{CP}$( ${{\mathit B}}$ $\rightarrow$ ${{\mathit K}^{*}}{{\mathit \gamma}}$ ) = ($\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{*+}}{{\mathit \gamma}}$ ) + $\mathit A_{CP}$( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}^{*0}}{{\mathit \gamma}}$ ))/2

INSPIRE   PDGID:

S049A03

This is the average $\mathit CP$ asymmetry.

VALUE DOCUMENT ID TECN  COMMENT $-0.001$ $\pm0.014$ $\pm0.003$ 1 HORIGUCHI 2017 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$ 1  Uses B( ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit B}^{+}}{{\mathit B}^{-}}$ ) = ($51.4$ $\pm0.6)\%$ and B( ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit B}^{0}}{{\overline{\mathit B}}^{0}}$ ) = ($48.6$ $\pm0.6)\%$.

Conservation Laws:

$\mathit CP$ INVARIANCE

References:

HORIGUCHI 2017 PRL 119 191802 Evidence for Isospin Violation and Measurement of $\mathit CP$ Asymmetries in ${{\mathit B}}$ $\rightarrow$ ${{\mathit K}^{*}{(892)}}{{\mathit \gamma}}$

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