$\mathit CP$ VIOLATION PARAMETERS

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

INSPIRE   PDGID:
S042CEG
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.1 \pm0.4}$ OUR AVERAGE  Error includes scale factor of 1.4.
$0.48$ $\pm0.41$ $\pm0.07$ 1, 2
NAKANO
2018
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.32$ ${}^{+0.40}_{-0.39}$ $\pm0.07$ 3
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  Reversed the sign for C=-A.
3  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 ${{\mathit \eta}}{{\mathit K}}{{\mathit \gamma}}$