$\mathit CP$ AND $\mathit T$ VIOLATION PARAMETERS

Measured values of the triple-product asymmetry parameters, odd under time-reversal, are defined as ${{\mathit A}}_{c(s)}({{\mathit \Lambda}}/{{\mathit \phi}}$) = (${{\mathit N}}{}^{+}_{c(s)}$ $−$ ${{\mathit N}}{}^{−}_{c(s)}$) $/$ (sum) where ${{\mathit N}}{}^{+}_{c(s)}$, ${{\mathit N}}{}^{−}_{c(s)}$ are the number of ${{\mathit \Lambda}}$ or ${{\mathit \phi}}$ candidates for which the cos(${{\mathit \Phi}}$) and sin(${{\mathit \Phi}}$) observables are positive and negative, respectively. Angles cos(${{\mathit \Phi}}$) and sin(${{\mathit \Phi}}$) are defined as in LEITNER 2007 .

${{\mathit A}}_{c}({{\mathit \Lambda}}$)

INSPIRE   PDGID:
S040TCL
VALUE DOCUMENT ID TECN  COMMENT
$-0.22$ $\pm0.12$ $\pm0.06$
AAIJ
2016J
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
AAIJ 2016J
PL B759 282 Observation of the ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \phi}}$ Decay