$K_{L} \to γ γ$ : Theory and phenomenology

Publisher Website

1 November 1981

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

Vol. 24 (9) , 2476-2480
https://doi.org/10.1103/physrevd.24.2476

Abstract

We compute the one-loop quark-diagram contribution to

d \bar{s} \to γ γ

in the standard model as a function of

m_{q}

where

q = u, c, t, etc

. We find it to be bounded, and such that the process

K_{L} \to γ γ

is likely to be dominated by low-energy contributions. We then use a phenomenological pole-dominance model to obtain

| \frac{A_{theory}}{A_{experiment}} | = 1.0 \pm 0.3

.

Keywords

QUANTUM CHROMODYNAMICS

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