$\mathit CP$ VIOLATION PARAMETERS

$\mathit S_{ {{\mathit \eta}} {{\mathit K}^{0}} {{\mathit \gamma}} }$ ( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit K}^{0}}{{\mathit \gamma}}$ )

INSPIRE   PDGID:
S042SEG
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ -0.5 \pm0.5}$ OUR AVERAGE  Error includes scale factor of 1.2.
$-1.32$ $\pm0.77$ $\pm0.36$ 1
NAKANO
2018
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.18$ ${}^{+0.49}_{-0.46}$ $\pm0.12$ 2
AUBERT
2009
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  Assuming ${\mathit m}_{ {{\mathit \eta}} {{\mathit K}_S^0} }$ $<$ 2.1 GeV.
2  Assuming ${\mathit m}_{ {{\mathit \eta}} {{\mathit K}} }$ $<$ 3.25 GeV.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
NAKANO 2018
PR D97 092003 Measurement of time-dependent $CP$ asymmetries in $B^{0}\to K_S^0 \eta \gamma$ decays
AUBERT 2009
PR D79 011102 Branching Fractions and $\mathit CP$-Violating Asymmetries in Radiative ${{\mathit B}}$ Decays to ${{\mathit \eta}}{{\mathit K}}{{\mathit \gamma}}$