${{\mathit \Lambda}}$ $\mathit CP$-violating decay-rate asymmetries

This is the difference between ${{\mathit \Lambda}}$ and ${{\overline{\mathit \Lambda}}}$ decay rates to state ${{\mathit f}}$ and ${{\overline{\mathit f}}}$ divided by the sum of the rates:$
$ $\mathit A_{CP}({{\mathit f}}$) = [(B( ${{\mathit \Lambda}}$ $\rightarrow$ ${{\mathit f}}$)) $−$ (B( ${{\overline{\mathit \Lambda}}}$ $\rightarrow$ ${{\overline{\mathit f}}}$))]/Sum.

Limit on ${{\overline{\mathit \Lambda}}}{{\mathit \Lambda}}$ oscillations

INSPIRE   PDGID:
S018A05
Upper limit for the oscillation rate of ( ${{\overline{\mathit \Lambda}}}$ $\rightarrow$ ${{\mathit \Lambda}}$) hyperons. A test of baryon number nonconservation. We quote the oscillation parameter ${{\mathit \delta}}$m$_{{{\overline{\mathit \Lambda}}} {{\mathit \Lambda}}}$, deduced from the oscillation rate P(${{\mathit \Lambda}}$) and the hyperon lifetime ${\mathit \tau}_{{{\mathit \Lambda}}}$, as (${{\mathit \delta}}$m$_{{{\overline{\mathit \Lambda}}} {{\mathit \Lambda}}}){}^{2}$ = P(${{\mathit \Lambda}}$) $/$ 2${{\mathit \tau}^{2}}_{{{\mathit \Lambda}}}$.
VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT
$\bf{<3.8 \times 10^{-18}}$ 90 1
ABLIKIM
2023BM
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\overline{\mathit \Lambda}}}$
1  ABLIKIM 2023BM quote the oscillation rate limit P(${{\mathit \Lambda}}$) $<$ $4.4 \times 10^{-6}$ and calculate the oscillation parameter ${{\mathit \delta}}$m$_{{{\overline{\mathit \Lambda}}} {{\mathit \Lambda}}}$ given here.
References