Diagrammatic analysis of some contributions to the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Δ</mi><mi>I</mi><mo>=</mo><mfrac><mrow><mn>1</mn></mrow><mrow><mn>2</mn></mrow></mfrac></math></span> rule

Mark B. Wise; Edward Witten

doi:10.1103/PhysRevD.20.1216

Diagrammatic analysis of some contributions to the $Δ I = \frac{1}{2}$ rule

Mark B. Wise and Edward Witten

Phys. Rev. D 20, 1216 – Published 1 September 1979

Abstract

Higher-order gluon corrections to a particular mechanism for the $Δ I = \frac{1}{2}$ rule are computed using quantum chromodynamics. It is found that due to gauge invariance these corrections leave the form of the lowest-order result essentially unchanged.