CKM substructure
نویسندگان
چکیده
A bstract The CKM matrix is not generic. Wolfenstein parametrization encodes structure by having one small parameter, λ ≈ 0 . 22. We pose the question: there substructure in that goes beyond single parameter of parameterization? find two relations are approximately satisfied: |V td | 2 = cb 3 and ub us 4 discuss statistical significance these they may indicate deeper matrix. current precision, however, cannot exclude an $$ \mathcal{O}\left(10\%\right) O 10 % accident.
منابع مشابه
Implications of CKM Unitarity
Three generation CKM Unitarity in the Standard Model predicts |Vud |2 + |Vus| + |Vub| = 1. Nuclear, K`3 and b → u decays currently give |Vud |2 + |Vus| + |Vub| = 0.9991(8). The good agreement between theory and experiment can be used to constrain “new physics” effects at the tree and quantum loop level. Examples considered are: exotic muon decays, heavy quark or lepton mixing, high scale induce...
متن کاملCKM Phase Measurements
Recent experimental results on CP violation in the B sector from BABAR and BELLE, experiments at asymmetric e+e− B-Factories, are summarized in these proceedings. The constraint on the position of the apex of the unitary triangle, obtained from these measurements allows a test of the CKM interpretation of CP violation in the Standard Model. Proceedings to the 15th International Topical Conferen...
متن کاملCkm Status and Prospects
This presentation reviews the Standard Model formalism governing the weak decays of quarks, as embodied in the Cabibbo-Kobayashi-Maskawa (CKM) weak mixing matrix, and summarizes the experimental status and outlook. Two recent CLEO |Vcb| analyses are described. Complications from strong interactions in relating the experimentally accessible quantities to CKM elements are highlighted, and prospec...
متن کامل1 The CKM Matrix
This is a quick review of CP non-conservation in B physics. Several methods are described for testing the Kobayashi-Maskawa single phase origin of CP violation in B decays, pointing out some limitations due to hadronic uncertainties. A few characteristic signatures of new physics in B decay asymmetries are listed. Invited talk given at the 1999 Chicago Conference on Kaon Physics Chicago, IL, Ju...
متن کاملAnd Ckm Unitarity
The Cabibbo-Kobayashi-Maskawa (CKM) [1,2] three-generation quark mixing matrix written in terms of the Wolfen-stein parameters (λ, A, ρ, η) [3] nicely illustrates the orthonor-mality constraint of unitarity and central role played by λ. V CKM = ⎛ ⎝ V ud V us V ub V cd V cs V cb V td V ts V tb ⎞ ⎠ = ⎛ ⎝ 1 − λ 2 /2 λ Aλ 3 (ρ − iη) −λ 1 − λ 2 /2 Aλ 2 Aλ 3 (1 − ρ − iη) −Aλ 2 1 ⎞ ⎠ +O(λ 4). (1) That...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2021
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep01(2021)143