KL→π0e+e−andKL→π0μ+μ−: a binary star on the stage of flavor physics

2006/06/30 by Federico Mescia, Christopher Smith, Stéphanie Trine +1 · 4 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:10.1088/1126-6708/2006/08/088

published as JHEP 0608 (2006) 088 · 20 pages, 5 figures. Comments and references added, minor numerical changes, conclusion unchanged, to appear in JHEP

arxiv created 2006/08/29 · openalex publication_date 2006/08/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

A systematic analysis of New Physics impacts on the rare decays KL to pi0 l+ l- is performed. Thanks to their different sensitivities to flavor-changing local effective interactions, these two modes could provide valuable information on the nature of the possible New Physics at play. In particular, a combined measurement of both modes could disentangle scalar/pseudoscalar from vector or axial-vector contributions. For the latter, model-independent bounds are derived. Finally, the KL to pi0 mu+ mu- forward-backward CP-asymmetry is considered, and shown to give interesting complementary information.

Citations

• Full CKM matrix with lattice QCD
• CP violation and the CKM matrix: assessing the impact of the asymmetric B factories
• On the electron–positron energy asymmetry in KL→π0e+e−
• Model independent constraints on leptoquarks from rare processes
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• Rare and CP-violatingKandBdecays in the Littlest Higgs model with T-parity
• Improved estimates of rareKdecay matrix elements fromKℓ3decays
• The s → dγ decay in and beyond the Standard Model
• Experiments with -meson decays