$\mathit A_{\mathit T/CP}$ is defined as

${\mathit P( {{\overline{\mathit B}}^{0}} \rightarrow {{\mathit B}^{0}} )–\mathit P( {{\mathit B}^{0}} \rightarrow {{\overline{\mathit B}}^{0}} )\over \mathit P( {{\overline{\mathit B}}^{0}} \rightarrow {{\mathit B}^{0}} )+\mathit P( {{\mathit B}^{0}} \rightarrow {{\overline{\mathit B}}^{0}} )}~$,

the $\mathit CPT$ invariant asymmetry between the oscillation probabilities P( ${{\overline{\mathit B}}^{0}}$ $\rightarrow$ ${{\mathit B}^{0}}$ ) and P( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\overline{\mathit B}}^{0}}$ ).

VALUE DOCUMENT ID TECN  COMMENT $0.005$ $\pm0.012$ $\pm0.014$ 1 AUBERT 2002 K BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$ 1  AUBERT 2002K uses the charge asymmetry in like-sign dilepton events.

Conservation Laws:

$\mathit CP$ INVARIANCE

References:

AUBERT 2002K PRL 88 231801 Search for $\mathit T$ and $\mathit CP$ Violation in ${{\mathit B}^{0}}-{{\overline{\mathit B}}^{0}}$ Mixing with Inclusive Dilapton Events