Experimental study ofKL0→π+π−γand other rare decay modes

Publisher Website

1 December 1976

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

Vol. 14 (11) , 2839-2856
https://doi.org/10.1103/physrevd.14.2839

Abstract

Using the SLAC

K_{L}^{0}

spectrometer facility, we have measured the ratio

\frac{(K_{L}^{0} \to π^{+} π^{-} γ)}{Γ (K_{L}^{0} \to all)}

to be (6.2 ± 2.1) ×

10^{- 5}

. The ratio and Dalitz-plot distribution of 24 ± 10 events are consistent with

CP

conservation in this weak-electromagnetic decay. We have also set upper limits on various processes, as follows:

\frac{Γ (K_{L}^{0} \to μ^{+} μ^{-} γ)}{Γ (K_{L}^{0} \to all)} \leq 7.8 \times 10^{- 6}

, 90% C.L.;

\frac{Γ (K_{L}^{0} \to μ^{+} μ^{-} π^{0})}{Γ (K_{L}^{0} \to all)} \leq 5.7 \times 10^{- 5}

, 90% C.L.;

\frac{Γ (K_{L}^{0} \to π^{+} π^{-} e^{+} e^{-})}{Γ (K_{L}^{0} \to all)} \leq 8.8 \times 10^{- 6}

, 90% C.L.;

\frac{Γ (K_{L}^{0} \to π^{0} π^{\pm} e^{\mp} ν)}{Γ (K_{L}^{0} \to all)} \leq 2.2 \times 10^{- 3}

, 90% C.L.

Keywords

This publication has 47 references indexed in Scilit:

Measurement of the ${K_{L}}^{0} \to π^{+} π^{-} π^{0}$ Dalitz Plot
Physical Review Letters, 1974
Measurement of the form factors in the decayKL0→πμν
Physical Review D, 1974
Measurement of the charge asymmetry in the decayKL0→π±μ∓ν
Physical Review D, 1974
Measurement of the KS0 → π+π−γ decay rate
Physics Letters B, 1973
An experimental study of photon-initiated showers in lead between 150 and 450 MeV
Nuclear Instruments and Methods, 1973
Test of $CP$ Noninvariance in the Decay $K^{\pm} \to π^{\pm} π^{0} γ$
Physical Review Letters, 1973
Evidence for Direct Emission in the Decay $K^{\pm} \to π^{\pm} π^{0} γ$
Physical Review Letters, 1972
A data-acquisition system for a large wire chamber spectrometer
Nuclear Instruments and Methods, 1972
PossibleCP-noninvariant effects in πпγ decay of neutral kaons
Il Nuovo Cimento A (1971-1996), 1967
Possible $C$ , $T$ Noninvariance in the Electromagnetic Interaction
Physical Review B, 1965