Rare Kaon Decays K → πνν̄ and K L → π 0 ` + ` −
نویسنده
چکیده
Over the next years, the Flavour Physics community will be looking for inconsistencies of the Standard Model (SM) by exploiting new and precise measurements. In these " indirect new physics " searches, the key strategy is to concentrate on observables, which are theoretically clean and preferably suppressed in the SM. In this respect, the four golden modes K + → π + ν ¯ ν, K L → π 0 ν ¯ ν and K L → π 0 + − are very promising.The pollution from hadronic uncertainties in these decays is at present under control with good accuracy, thanks to the interplay between theory information (Chiral Perturbation Theory and OPE) and experimental inputs (KTeV, NA48). Their measurements might thus give rise to some unexpected scenario. Here, we briefly review the present situation for these four exclusive rare decays. c Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
منابع مشابه
NNLO contributions to εK and rare kaon decays
We discuss the theory prediction of εK and the rare K → πνν̄ decays and review the structure and current status of higher-order contributions to these flavour changing processes in the standard model in some detail. This includes the next-to-next-to-leading order QCD calculation to the charm quark contribution to K+ → π+νν̄ and to the charm-top quark contribution to εK . Electroweak corrections t...
متن کاملProspects for a lattice computation of rare kaon decay amplitudes II K → πνν̄ decays
The rare kaon decays K → πνν̄ are strongly suppressed in the standard model and widely regarded as processes in which new phenomena, not predicted by the standard model, may be observed. Recognizing such new phenomena requires precise standard model prediction for the braching ratio of K → πνν̄ with controlled uncertainty for both short-distance and long-distance contributions. In this work we de...
متن کاملRare Kaon Decays – Overview
The theory of rare K decays is reviewed, emphasizing short-distance processes and the prospects to probe the physics of flavour. A brief overview of the subject is presented, along with a more detailed discussion of the theory of K → πνν̄ decays. Invited Talk presented at KAON 2001 International Conference on CP Violation, Pisa, 12-17 June 2001
متن کامل– 1 – Rare Kaon Decays
A. Introduction: There are several useful reviews on rare kaon decays and related topics [1–14]. Activity in rare kaon decays can be divided roughly into four categories: 1. Searches for explicit violations of the Standard Model 2. Measurements of Standard Model parameters 3. Searches for CP violation 4. Studies of strong interactions at low energy. The paradigm of Category 1 is the lepton flav...
متن کاملInclusive Rare B Decays
We review the present status of rare B decays, focusing on inclusive decay modes and their role in our search for new physics. We also briefly discuss direct CP violation in rare B decays and the rare kaon decays K → πνν̄ and KL → πνν̄, which offer complementary opportunities for precision flavour physics. Based on invited talks given at the 8th International Conference on Supersymmetries in Phys...
متن کامل