Instantons and the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">Δ</mi><mi mathvariant="italic">I</mi><mspace></mspace><mo>=</mo><mspace></mspace><mn>1</mn><mn></mn><mi>/</mi><mn>2</mn></math></span> Rule

N. I. Kochelev; V. Vento

doi:10.1103/PhysRevLett.87.111601

Instantons and the $Δ I = 1 / 2$ Rule

N. I. Kochelev and V. Vento

Phys. Rev. Lett. 87, 111601 – Published 24 August 2001

Abstract

The instanton-induced interaction leads to a significant enhancement of the $A_{0}$ weak amplitude determining the $Δ I = 1 / 2$ rule, through the contribution of operators with dimension $d = 9$ , as we show in the weak $K \to π π$ decay.

Received 8 February 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.111601

Authors & Affiliations

N. I. Kochelev^1,2,3 and V. Vento¹

¹Departament de Física Teòrica and Institut de Física Corpuscular, Universitat de València-CSIC, E46100 Burjassot (Valencia), Spain
²Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980 Russia
³Institute of Physics and Technology, Almaty, 480082 Kazakhstan