$\mathit CPT$-INVARIANCE TESTS IN ${{\mathit K}_L^0}$ DECAYS

PHASE DIFFERENCE $\phi _{+−}$ $−$ $\phi _{{\mathrm {SW}}}$

INSPIRE   PDGID:
S013DFS
Test of $\mathit CPT$. The Superweak phase $\phi _{{\mathrm {SW}}}{}\equiv$ tan${}^{-1}$ (2$\Delta \mathit m/\Delta \Gamma $) where $\Delta \mathit m$ = ${\mathit m}_{{{\mathit K}_L^0} }–{\mathit m}_{{{\mathit K}_S^0} }$ and $\Delta \Gamma $ = $\hbar{}(\tau _{\mathit L}−\tau _{\mathit S})/(\tau _{\mathit L}\tau _{\mathit S}$).
VALUE ($^\circ{}$) DOCUMENT ID TECN
$0.61$ $\pm0.62$ $\pm1.01$ 1
ALAVI-HARATI
2003
KTEV
1  ALAVI-HARATI 2003 fit is the same as their $\phi _{+−}$, $\tau _{{{\mathit K}_{{S}}}}$, $\Delta \mathit m$ fit, except that the parameter $\phi _{+−}−\phi _{{\mathrm {SW}}}$ is used in place of $\phi $.
References:
ALAVI-HARATI 2003
PR D67 012005 Measurements of Direct $\mathit CP$ Violation, $\mathit CPT$ Symmetry, and other Parameters in the Neutral Kaon System
Also
PR D70 079904 (errat.) Erratum to ALAVI-HARATI 2003 : “Measurements of Direct $\mathit CP$-Violation, $\mathit CPT$ Symmetry, and other Parameters in the Neutral Kaon System''