Light-by-light scattering contribution to the decay rate of orthopositronium at order $α^{2}$ $Γ_{LO}$

Publisher Website

1 February 1995

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

Vol. 51 (2) , R875-R878
https://doi.org/10.1103/physreva.51.r875

Abstract

We calculate the contribution of the six radiatively corrected light-by-light scattering graphs to the decay rate of orthopositronium. Our result is

Γ_{light - by - light}

= -

α^{2}

ln(1/α)

Γ_{LO}

+9.0074(9)(

α^{2}

/

π^{2}

)

Γ_{LO}

. Our result contains a known analytic logarithm plus a new constant term which contributes 0.000 350 μ

s^{- 1}

to the rate.

Keywords

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