$\mathit CP$ VIOLATION PARAMETERS

(S$_{+}$ $+$ S$_{-})/$2 ( ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{*-}}{{\mathit \pi}^{+}}$)

INSPIRE   PDGID:
S042LD3
S$_{\pm{}}$ = $−$ ${2 Im(\lambda _{\pm{}})\over 1 + \vert \lambda _{\pm{}}\vert ^2}$ where $\lambda _{+}$ and $\lambda _{−}$ are defined in the C$_{{{\mathit \pi}} {{\mathit \pi}}}$ datablock above for ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{*-}}{{\mathit \pi}^{+}}$ and ${{\overline{\mathit B}}^{0}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$.

VALUE DOCUMENT ID TECN  COMMENT
$\bf{ -0.039 \pm0.011}$ OUR AVERAGE
$-0.046$ $\pm0.013$ $\pm0.015$ 1
BAHINIPATI
2011
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.040$ $\pm0.023$ $\pm0.010$ 2
AUBERT
2006Y
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.034$ $\pm0.014$ $\pm0.009$ 1
AUBERT
2005Z
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.039$ $\pm0.020$ $\pm0.013$ 3
RONGA
2006
BELL Repl. by BAHINIPATI 2011
$-0.030$ $\pm0.028$ $\pm0.018$ 1
GERSHON
2005
BELL Repl. by RONGA 2006
$-0.068$ $\pm0.038$ $\pm0.020$ 2
AUBERT
2004V
BABR Repl. by AUBERT 2006Y
$-0.063$ $\pm0.024$ $\pm0.014$ 1
AUBERT
2004W
BABR Repl. by AUBERT 2005Z
$0.060$ $\pm0.040$ $\pm0.019$ 2
SARANGI
2004
BELL Repl. by RONGA 2006
1  Uses partially reconstructed ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{*\pm}}{{\mathit \pi}^{\mp}}$ decays.
2  Uses fully reconstructed ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{*\pm}}{{\mathit \pi}^{\mp}}$ decays.
3  Combines the results from fully reconstructed and partially reconstructed ${{\mathit D}^{*}}{{\mathit \pi}}$ events by taking weighted averages. Assumes that systematic errors from physics parameters and fit biases in the two measurements are 100$\%$ correlated.
Conservation Laws:
$\mathit CP$ INVARIANCE
References