2004/07/31 by Aldo Deandrea, Micaela Oertel, Julien Welzel · 1 citation
Physics and Astronomy · #CP violation #Current (fluid) #Flavour #Neutral current #Neutrino Physics Research #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1088/1126-6708/2004/10/038
published as JHEP 0410:038,2004 · 17 pages, 2 figures, 1 table, LaTeX, JHEP style, references and 1 figure updated, minor changes in the text
openalex publication_date 2004/10/19 · arxiv created 2004/10/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Flavour changing neutral current decays are a very sensitive test of the standard model and its extensions. In particular the decay K -> pi nu nubar constitutes a clean way to provide constraints, independent of long distance effects. Motivated by the recent experimental data of the E787 and E865 collaborations and by the difference between the standard model prediction and data, we consider in detail new physics scenarios such as the minimal supersymmetric standard model and R-parity violating supersymmetry. We begin with analysing the impact of new measurements on the standard model result obtaining B(K+ -> pi+ nu nubar)=(8.18 +/- 1.22) x 10^(-11). Predictions for other rare kaon decays are discussed, too. Our results allow to improve the limits on R-parity violating couplings with respect to previous analyses.