Rate and spectrum ofKL→π0γγ

1 January 1990

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

Vol. 41 (1) , 161-165
https://doi.org/10.1103/physrevd.41.161

Abstract

The branching ration of

K_{L} \to π^{0} γ γ

and the invariant-mass spectrum of the photon pair are calculated taking account of two distinct mechanisms: an amplitude involving

VP γ

couplings and an amplitude involving a pion loop. The two contributions are comparable in rate, but strikingly different in their spectra. We determine the spectrum, including both components, and estimate a branching ratio (1.8, 3.9) ×

10^{- 6}

for (destructive, constructive) interference.

Keywords

This publication has 14 references indexed in Scilit:

The CP violating contribution to the decay KL → π0e+e−∗
Nuclear Physics B, 1989
Chiral lagrangians for massive spin-1 fields
Physics Letters B, 1989
CP violation in the KL→π0ℓ+ℓ− decay amplitude for large mt
Physics Letters B, 1989
The CP conserving long-distance contribution to the decay KL→πoe+e−
Physics Letters B, 1989
CP violation in $K_{L}$ → $π^{0}$ $e^{+}$ $e^{-}$ : Interference of one-photon and two-photon exchange
Physical Review D, 1988
Radiative Kaon decays and CP violation in chiral perturbation theory
Nuclear Physics B, 1988
K0 → π0γγ decays in chiral perturbation theory
Physics Letters B, 1987
$K_{L}$ → $π^{0}$ $e^{+}$ $e^{-}$ as a probe of CP violation
Physical Review D, 1987
Weak hadronic decays: $K \to 2 π$ and $K \to 3 π$
Reviews of Modern Physics, 1979
Model of the Decay $K_{2} \to π^{0} γ γ$ and a Unitarity Constraint on the Decay Rate
Physical Review D, 1972