SUSY contributions to the charge asymmetry in K±→π±ℓ+ℓ− decays

2002/02/25 by A. Messina, Andrea Messina
Physics and Astronomy · #Asymmetry #Black Holes and Theoretical Physics #Charge (physics) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Supersymmetry #hep-ph

paper · pdf · doi:10.1016/s0370-2693(02)01884-1

published as Phys.Lett. B538 (2002) 130-136 · 9 pages, 1 figure

arxiv created 2002/02/25 · openalex publication_date 2002/06/01 · arxiv updated 2015/06/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We analyse the contributions to the charge asymmetry in K^±→π^±ℓ⁺ℓ^- decays induced by gluino-exchange diagrams in the context of supersymmetric models with generic flavour couplings. We show that sizeable deviations with respect to the Standard Model are possible only under special circumstances. Within this scenario we set an upper limit of about 10^-3 for the relative charge asymmetry -- integrated for M_ℓ⁺ℓ^- > 2 M_π -- of both muon and electron channels. We also show that this limit is close to saturating a model-independent upper bound on the charge asymmetry derived from the present constraints on Γ(K_L →π⁰ ℓ⁺ ℓ^-).

Citations

• Standard model confronting new results for ε′/ε
• The Standard Model prediction for ε′/ε
• A complete analysis of FCNC and CP constraints in general SUSY extensions of the standard model
• New Measurement of the Properties of the Rare DecayK+→π+e+e−