SU(3) and nonet breaking effects inKL→γγinduced bys→d+2gluons due to an anomaly

2002/10/31 by Xiao-Gang He, X. -G. He, Chao-Shang Huang +3 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.67.096005

published as Phys.Rev. D67 (2003) 096005 · RevTex, 12 Pages, no figures. Version to be published in PRD

arxiv created 2003/05/20 · openalex publication_date 2003/05/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In this paper we study the effects of \stackrel\ensuremath→sd+2 gluon on K_L\ensuremath→\ensuremathγ\ensuremathγ in the standard model. We find that this interaction can induce new sizable SU(3) and U(3) nonet breaking effects in K_L\ensuremath-\ensuremathη,\ensuremathη^\ensuremath' transitions and therefore in K_L\ensuremath→\ensuremathγ\ensuremathγ due to large matrix elements of 〈\ensuremathη(\ensuremathη^\ensuremath')|\ensuremathα_sG_\ensuremathμ\ensuremathν^aG_a^\ensuremathμ\ensuremathν|0〉 from the QCD anomaly. These new effects play an important role in explaining the observed value. We also study the effects of this interaction on the contribution to \ensuremathΔm_K_L\ensuremath-K_S.

Citations

• Review of Particle Physics

Cited by

• Kaon decays in the standard model
• Neutrino proton elastic scattering and the spin structure of the proton