pdgLive Home   >   BOTTOM BARYONS ($\mathit B$ = $-1$)   >   ${{\mathit \Lambda}_{{b}}^{0}}$   >   $\Delta \mathit A_{CP}$( ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ )

$\mathit CP$ VIOLATION

$\mathit A_{CP}$ is defined as
$\mathit A_{CP}$ = ${B( {{\mathit \Lambda}_{{b}}^{0}} \rightarrow {{\mathit f}} ) – B( {{\overline{\mathit \Lambda}}_{{b}}^{0}} \rightarrow {{\overline{\mathit f}}} )\over B( {{\mathit \Lambda}_{{b}}^{0}} \rightarrow {{\mathit f}} ) + B( {{\overline{\mathit \Lambda}}_{{b}}^{0}} \rightarrow {{\overline{\mathit f}}} )}$,
the $\mathit CP$-violation asymmetry of exclusive ${{\mathit \Lambda}_{{b}}^{0}}$ and ${{\overline{\mathit \Lambda}}_{{b}}^{0}}$ decay.

$\Delta \mathit A_{CP}$( ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ )

INSPIRE   PDGID:

S040A10

$\Delta \mathit A_{CP}{}\equiv$ $\mathit A_{CP}$( ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ ) $−$ $\mathit A_{CP}$( ${{\mathit p}}{{\mathit K}^{-}}{{\mathit J / \psi}}$ )

VALUE ($ 10^{-2} $) DOCUMENT ID TECN  COMMENT $-3.5$ $\pm5.0$ $\pm0.2$ AAIJ 2017 T LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV

Conservation Laws:

$\mathit CP$ INVARIANCE

References:

AAIJ 2017T JHEP 1706 108 Observation of the Decay ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and a Search for $\mathit CP$ Violation

Except where otherwise noted, content of the 2023 Review of Particle Physics is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy), JPS and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2023. See LBNL disclaimers.