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$T$ VIOLATION TESTS IN $K^{+}$ AND $K^{-}$ DECAYS

Im( $ξ$ ) in $K^{+}$ $\to$ $π^{0} μ^{+} ν_{μ}$ DECAY (from transverse $μ$ pol.)

Test of

T

reversal invariance.

VALUE

EVTS

DOCUMENT ID

TECN

CHG

COMMENT

- 0.006 \pm 0.008

OUR AVERAGE

- 0.0053

\pm 0.0071

\pm 0.0036

ABE

2004

K246

- 0.016

\pm 0.025

20M

CAMPBELL

1981

CNTR

Pol.

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

- 0.013

\pm 0.016

\pm 0.003

3.9M

ABE

1999

CNTR

p_{T}

K^{+}

at rest

¹	Includes three sets of data: 96-97 (ABE 1999S), 98, and 99-00 totaling about three times the ABE 1999S data sample. Corresponds to Im( $ξ$ ) $<$ 0.016 at 90 $%$ CL.

Conservation Laws:

TIME REVERSAL (

T

) INVARIANCE

References

ABE

2004F

PRL 93 131601

A New Limit of

T

-Violating Transverse Muon Polarization in the

K^{+}

\to

π^{0} μ^{+} ν

Decay

Also

PR D73 072005

Search for

T

-Violating Transverse Muon Polarization in the

K^{+}

\to

π^{0} μ^{+} ν

Decay

ABE

1999S

PRL 83 4253

Search for

T

-Violating Transverse Muon Polarization in

K^{+}

\to

π^{0} μ^{+} ν

Decay using Stopped Kaons

CAMPBELL

1981

PRL 47 1032

Limits on

C P

Invariance Violation in

K_{μ 3}^{+}

Decays

Also

PR D27 1056

Search for

T

Invariance Violation in

K_{μ 3}^{+}

Decay

Except where otherwise noted, content of the 2024 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2024. See LBNL disclaimers.

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