pdgLive Home   >   BOTTOM BARYONS ($\mathit B$ = $-1$)   >   ${{\mathit \Lambda}_{{b}}^{0}}$   >   a$_{P}$( ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ )

$\mathit P$ VIOLATION PARAMETERS

Observables calculated as average of the triple products for ${{\mathit \Lambda}_{{b}}^{0}}$ and ${{\overline{\mathit \Lambda}}_{{b}}^{0}}$, which is sensitive to parity violation.

a$_{P}$( ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ )

INSPIRE   PDGID:

S040A06

VALUE (%) DOCUMENT ID TECN  COMMENT $-4.0$ $\pm0.7$ $\pm0.2$ 1 AAIJ 2020 AB LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV • • We do not use the following data for averages, fits, limits, etc. • • $-3.71$ $\pm1.45$ $\pm0.32$ 2 AAIJ 2017 H LHCB Repl. by AAIJ 2020AB 1  Used both triple product asymmetries and the unbinned energy test method. 2  Measured over full phase space of the decay.

Conservation Laws:

PARITY ($\mathit P$) INVARIANCE

References:

AAIJ 2020AB PR D102 051101 Search for $C\!P$ violation and observation of $P$ violation in $\Lambda_b^0 \to p \pi^- \pi^+ \pi^-$ decays AAIJ 2017H NATP 13 391 Measurement of Matter-Antimatter Differences in Beauty Baryon Decays

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.