$\mathit CP$ VIOLATION PARAMETERS

$\mathit C_{{{\mathit \pi}^{0}} {{\mathit \pi}^{0}}}$( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$)

INSPIRE   PDGID:
S042CX6
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ -0.30 \pm0.20}$ OUR AVERAGE
$-0.14$ $\pm0.46$ $\pm0.07$ 1
ABUDINEN
2023E
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.14$ $\pm0.36$ $\pm0.10$ 1
JULIUS
2017
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.43$ $\pm0.26$ $\pm0.05$
LEES
2013D
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.49$ $\pm0.35$ $\pm0.05$
AUBERT
2007BC
BABR Repl. by LEES 2013D
$-0.12$ $\pm0.56$ $\pm0.06$ 2
AUBERT
2005L
BABR Repl. by AUBERT 2007BC
$-0.44$ ${}^{+0.52}_{-0.53}$ $\pm0.17$ 1
CHAO
2005
BELL Repl. by JULIUS 2017
1  Quotes $\mathit A_{{{\mathit \pi}^{0}} {{\mathit \pi}^{0}}}$ which is equal to $−\mathit C_{{{\mathit \pi}^{0}} {{\mathit \pi}^{0}}}$.
2  Corresponds to a 90$\%$ CL interval of $-0.88$ $<$ $\mathit A_{CP}$ $<$ 0.64.
Conservation Laws:
$\mathit CP$ INVARIANCE
References