($\Gamma\mathrm {({{\mathit \tau}^{+}})}$ $−$ $\Gamma\mathrm {({{\mathit \tau}^{-}})}$) $/$ ($\Gamma\mathrm {({{\mathit \tau}^{+}})}$ + $\Gamma\mathrm {({{\mathit \tau}^{-}})}$)

${{\mathit \tau}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit K}_S^0}$ ${{\mathit \nu}_{{\tau}}}$ (RATE DIFFERENCE) $/$ (RATE SUM)

INSPIRE   PDGID:
S035DR1
VALUE (%) DOCUMENT ID TECN  COMMENT
$-0.36$ $\pm0.23$ $\pm0.11$
LEES
2012M
 BABR 476 fb${}^{-1}{\it{}E}^{\it{}ee}_{\rm{}cm}$ = 10.6 GeV
References:
LEES 2012M
PR D85 031102 Search for $\mathit CP$ Violation in the Decay ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit K}_S^0}$ (${}\geq{}0{{\mathit \pi}^{0}}$) ${{\mathit \nu}_{{\tau}}}$
Also
PR D85 099904 (errat.) Erratum LEES 2012M: Search for $\mathit CP$ Violation in the Decay ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit K}_S^0}$ (${}\geq{}0{{\mathit \pi}^{0}}$) ${{\mathit \nu}_{{\tau}}}$