Precision tests of the Standard Model with K`3 decays
نویسنده
چکیده
I present a brief overview of the theoretical status of K 3 decays and their use as probes of lepton universality, light quark mass ratios, and CKM unitarity. I discuss in some detail the constraints imposed on the light quark masses by current measurements of the ratio of charged to neutral K 3 rates. * Speaker. † I would like to thank the organizers for partial financial support and the stimulating atmosphere during KAON 07. It is a pleasure to thank Helmut Neufeld for sharing unpublished results. c Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
منابع مشابه
Precision Standard Model Tests with Kaons
In kaon physics, several new precision measurements on flavour variables and CP violation have performed in the recent years. Presented are a new precise determination of the CKM parameter |Vus|, which combines the results of all experiments together with recent theoretical progress, and new measurements of the ratio RK = Γ(K + → eν)/Γ(K → μν), which is sensitive to contributions of a possible ...
متن کاملPrecision tests of the Standard Model with leptonic and semileptonic kaon decays
This paper presents the analysis of leptonic and semileptonic kaon decays data done by the FlaviaNet Kaon Working group, as described in [1]. Data include all recent results by BNL-E865, KLOE, KTeV, ISTRA+, and NA48. Experimental results are critically reviewed and combined, taking into account theoretical (both analytical and numerical) constraints on the semileptonic kaon form factors. We rep...
متن کاملStudies of Three-Body B^+→D ̅^* 〖(2007)〗^0 K^+ K ̅^0 and B^0→D^* 〖(2010)〗^- K^+ K ̅^0 Decays
We analyze three-body decays of and . Under the factorization approach, there are tree level diagrams for these decay modes and the transition matrix element of decay is factorized into a form factor multiplied by decay constant and form factor multiplied into weak vertices form factor. The transition matrix element of decay is also factorized into a form factor multiplied into weak vertic...
متن کاملSignatures of Supersymmetry in B Decays - A Theoretical Perspective
We discuss precision tests of the standard model in radiative and semileptonic rare B-decays and CP-violating asymmetries, and possible signatures of supersymmetry in these processes. Motivated by current data, and with an eye on the forthcoming measurements, we restrict ourselves to the processes in which the bench marks set by the standard model have either been met by ongoing experiments or ...
متن کاملDirect CP Violation in B Decays
We discuss several aspects of direct CP asymmetries in B decays, which are very useful in spite of hadronic uncertainties in asymmetry calculations. 1) Asymmetries in decays to D(∗)K(∗), π+π−, ρ+ρ−, providing precision tests for the CKM phase γ. 2) Null tests in B+ → J/ψK+, π+π0, where a nonzero asymmetry provides evidence for New Physics. 3) Isospin and broken flavor SU(3) relations among CP a...
متن کامل