$\mathit CP$ VIOLATION PARAMETERS in ${{\mathit B}_{{{s}}}^{0}}$

$\vert \lambda \vert $ (${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \phi}}$)

INSPIRE   JSON PDGID:
S086LJP
$\lambda $ = q/p$\cdot{}{{\mathit A}_{{{f}}}}/{{\overline{\mathit A}}_{{{f}}}}$ is a phase-convention-independent observable quantity for the final state ${{\mathit f}}$. See the review on "$\mathit CP$ Violation in the Quark Sector" for details.
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.995 \pm0.009}$ OUR EVALUATION  $~~$(Produced by HFLAV)
$\bf{ 0.994 \pm0.009}$ OUR AVERAGE
$1.011$ $\pm0.014$ $\pm0.015$ 1
HAYRAPETYAN
2026A
 
CMS ${{\mathit p}}{{\mathit p}}$ at 13 TeV
$0.990$ $\pm0.010$
AAIJ
2024A
 
LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV
• • We do not use the following data for averages, fits, limits, etc. • •
$0.877$ ${}^{+0.112}_{-0.116}$ $\pm0.031$
AAIJ
2021AN
 
LHCB Repl. by AAIJ 2024A
$0.972$ $\pm0.026$ $\pm0.008$ 2
SIRUNYAN
2021E
 
CMS Repl. by HAYRAPETYAN 2026A
$1.012$ $\pm0.016$ $\pm0.006$
AAIJ
2019Q
 
LHCB Repl. by AAIJ 2024A
$0.964$ $\pm0.019$ $\pm0.007$
AAIJ
2015I
 
LHCB Repl. by AAIJ 2024A
$0.93$ $\pm0.03$ $\pm0.02$
AAIJ
2013AR
 
LHCB Repl. by AAIJ 2015I
1  Measured using a time-dependent angular analysis of ${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$ decays with the ML-improved flavor-tagging algorithm.
2  Measured using time-dependent angular analysis of ${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$ decays.
References