$\mathit CP$ VIOLATION PARAMETERS

$\mathit S_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$)

INSPIRE   JSON  (beta) PDGID:
S042SJK
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.711 \pm0.011}$ OUR EVALUATION  $~~$(Produced by HFLAV)  See the ideogram below.
$\bf{ 0.710 \pm0.014}$ OUR AVERAGE  Error includes scale factor of 1.3.  See the ideogram below.
$0.724$ $\pm0.014$ 1
AAIJ
2024
LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 and 13 TeV
$0.724$ $\pm0.035$ $\pm0.009$ 2
ADACHI
2024H
 BEL2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.670$ $\pm0.029$ $\pm0.013$ 3
ADACHI
2012A
 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.738$ $\pm0.079$ $\pm0.036$ 4
ADACHI
2012A
 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.642$ $\pm0.047$ $\pm0.021$ 5
ADACHI
2012A
 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.57$ $\pm0.58$ $\pm0.06$ 6
SATO
2012
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(5S)}}$
$0.897$ $\pm0.100$ $\pm0.036$ 4
AUBERT
2009K
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.666$ $\pm0.031$ $\pm0.013$
AUBERT
2009K
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.79$ ${}^{+0.41}_{-0.44}$ 7
AFFOLDER
2000C
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.8 TeV
$0.84$ ${}^{+0.82}_{-1.04}$ $\pm0.16$ 8
BARATE
2000Q
 ALEP ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
$3.2$ ${}^{+1.8}_{-2.0}$ $\pm0.5$ 9
ACKERSTAFF
1998Z
 OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$0.717$ $\pm0.013$ $\pm0.008$ 10, 11
AAIJ
2024
LHCB ${{\mathit p}}{{\mathit p}}$ at 13 TeV
$0.649$ $\pm0.053$ $\pm0.018$ 12
AAIJ
2024
LHCB ${{\mathit p}}{{\mathit p}}$ at 13 TeV
$0.722$ $\pm0.014$ $\pm0.007$ 13
AAIJ
2024
LHCB ${{\mathit p}}{{\mathit p}}$ at 13 TeV
$0.760$ $\pm0.034$ 10, 14
AAIJ
2017BN
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$0.75$ $\pm0.04$ 13
AAIJ
2017BN
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$0.84$ $\pm0.10$ $\pm0.01$ 12
AAIJ
2017BN
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$0.731$ $\pm0.035$ $\pm0.020$ 15
AAIJ
2015N
 LHCB Repl. by AAIJ 2017BN
$0.73$ $\pm0.07$ $\pm0.04$ 16
AAIJ
2013K
 LHCB Repl. by AAIJ 2015N
$0.650$ $\pm0.029$ $\pm0.018$ 17
SAHOO
2008
BELL Repl. by ADACHI 2012A
$0.72$ $\pm0.09$ $\pm0.03$ 4
SAHOO
2008
BELL Repl. by ADACHI 2012A
$0.642$ $\pm0.031$ $\pm0.017$
CHEN
2007
BELL Repl. by ADACHI 2012A
1  A combination of this Run 2 result with the Run 1 result from AAIJ 2017BN is reported with a correlation coefficient of 0.40.
2  Uses ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ decays with 362 fb${}^{-1}$ BELL II data.
3  Uses ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ decays.
4  Based on ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit K}_S^0}$ decays.
5  Uses ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_L^0}$ decays.
6  SATO 2012 uses 121 fb${}^{-1}$ data collected at ${{\mathit \Upsilon}{(5S)}}$ resonance. Uses the ''${{\mathit B}}−{{\mathit \pi}}$ tagging'' where ${{\mathit B}}{{\mathit \pi}^{+}}$ and ${{\mathit B}}{{\mathit \pi}^{-}}$ tagged ${{\mathit J / \psi}}{{\mathit K}_S^0}$ events are compared.
7  AFFOLDER 2000C uses about 400 ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit K}_S^0}$ events. The production flavor of ${{\mathit B}^{0}}$ was determined using three tagging algorithms: a same-side tag, a jet-charge tag, and a soft-lepton tag.
8  BARATE 2000Q uses 23 candidates for ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit K}_S^0}$ decays. A combination of jet-charge, vertex-charge, and same-side tagging techniques were used to determine the ${{\mathit B}^{0}}$ production flavor.
9  ACKERSTAFF 1998Z uses 24 candidates for ${{\mathit B}_{{{d}}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit K}_S^0}$ decay. A combination of jet-charge and vertex-charge techniques were used to tag the ${{\mathit B}_{{{d}}}^{0}}$ production flavor.
10  Measurement based on ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ , ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit K}_S^0}$ with ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$, ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ and ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$.
11  AAIJ 2024 provides the correlation coefficient ${{\mathit \rho}}$ = 0.441 between the uncertainties of $\mathit C_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$) and $\mathit S_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$) measurements.
12  Measurement based on ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit K}_S^0}$ with ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$.
13  Measurement based on ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ with ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$.
14  AAIJ 2017BN provides the correlation coefficient ${{\mathit \rho}}$ = 0.42 between the uncertainties of $\mathit S_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$) and $\mathit C_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$) measurements.
15  AAIJ 2015N uses 41,560 flavor-tagged ${{\mathit B}_{{{d}}}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ events from 3 fb${}^{-1}$ of integrated luminosity. Provides the correlation coefficient ${{\mathit \rho}}$ = 0.483 between the statistical uncertainties of and measurements.
16  AAIJ 2013K uses 8200 flavor-tagged ${{\mathit B}_{{{d}}}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ events from 1 fb${}^{-1}$ of integrated luminosity. Provides the correlation coefficient ${{\mathit \rho}}$ = 0.42 between the statistical uncertainties of $\mathit S_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$) and $\mathit C_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$) measurements.
17  Combined result of CHEN 2007 and SAHOO 2008.

           $\mathit S_{{{\mathit J / \psi}{(nS)}} {{\mathit K}^{0}}}$ (${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}{(nS)}}{{\mathit K}^{0}}$)
Conservation Laws:
$\mathit CP$ VIOLATION OBSERVED
References