pdgLive

${{\mathit \Lambda}}$ ELECTRIC DIPOLE MOMENT

A nonzero value is forbidden by both $\mathit T$ invariance and $\mathit P$ invariance.

VALUE ($ 10^{-16} $ $\mathit e~$cm)

CL%

DOCUMENT ID

TECN

$\bf{<1.5}$

95

SPEC

• • We do not use the following data for averages, fits, limits, etc. • •

$<100$

95

EMUL

$<500$

95

EMUL

¹	PONDROM 1981 measures ($-3.0$ $\pm7.4$) $ \times 10^{-17}{{\mathit e}}$-cm.

²	BARONI 1971 measures ($-5.9$ $\pm2.9$) $ \times 10^{-15}{{\mathit e}}$-cm.

Conservation Laws:

TIME REVERSAL ($\mathit T$) INVARIANCE

PARITY ($\mathit P$) INVARIANCE

References:

PR D23 814

New Limit on the Electric Dipole Moment of the ${{\mathit \Lambda}}$ Hyperon

LNC 2 1256

An Upper Limit of the Electric Dipole Moment of the ${{\mathit \Lambda}}$ Hyperon

NC 45A 882

An Upper Limit to the Electric Dipole Moment of the ${{\mathit \Lambda}}$

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.