Test of $CP$ Noninvariance in the Decay $K^{\pm} \to π^{\pm} π^{0} γ$

12 March 1973

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 30 (11) , 500-503
https://doi.org/10.1103/physrevlett.30.500

Abstract

A careful search has been made for possible

CP

-nonconserving differences between

K^{+} \to π^{+} π^{0} γ

and

K^{-} \to π^{-} π^{0} γ

decays. In a sample of over 4000 completely reconstructed decays in the charged-pion kinetic-energy interval of 51 to 100 MeV, the asymmetry is 0.005 ± 0.020, with a systematic uncertainty of ± 0.022, indicating no evidence for a

CP

-invariance violation. This result, combined with that obtained from the sum spectrum, suggests that the direct emission is largely magnetic dipole.

Keywords

This publication has 8 references indexed in Scilit:

Evidence for Direct Emission in the Decay $K^{\pm} \to π^{\pm} π^{0} γ$
Physical Review Letters, 1972
Search for Direct Processes inK±→π±π0γDecays
Physical Review D, 1972
Possible $CP$ Violation in $K^{\pm} \to π^{\pm} π^{0} γ$
Physical Review B, 1967
Tests for $CP$ Noninvariance with $| Δ T | > \frac{1}{2}$ in the Partial Rates for $K^{\pm} \to π^{0} + π^{\pm}$ and $K^{\pm} \to γ + π^{0} + π^{\pm}$
Physical Review Letters, 1967
Possible $CP$ -Noninvariant Effects in $π π γ$ Decay of Charged $K$ Mesons
Physical Review Letters, 1967
Weak Interactions (Second Section) Chapter 8: Decays of Charged K Mesons
Annual Review of Nuclear Science, 1966
Some Consequences of $TCP$ -Invariance
Physical Review B, 1957
Parity Nonconservation and a Two-Component Theory of the Neutrino
Physical Review B, 1957

Test ofCPNoninvariance in the DecayK±→π±π0γ

Abstract

Keywords

Test of $CP$ Noninvariance in the Decay $K^{\pm} \to π^{\pm} π^{0} γ$