Integrability and unitarity
نویسندگان
چکیده
منابع مشابه
Strangeness and Unitarity
The strange-quark vector current form factors of the nucleon are analyzed within the framework of dispersion relations. Particular attention is paid to contributions made by KK̄ intermediate states to the form factor spectral functions. It is shown that, when the KK̄ → NN̄ amplitude is evaluated in the Born approximation, the KK̄ contributions are identical to those arising from a one-loop calculat...
متن کاملΓγ and Unitarity *
Agreement between the experimental value Γ(KS → γγ) and the number predicted via a one-loop chiral perturbation theory calculation has been cited as a success for the latter. On the other hand the one-loop prediction for the closely related process KL → π0γγ has been found to be a factor three below the experimental value. Using the inputs of unitarity and dispersion relations, we demonstrate t...
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 کاملHiggsless fermion masses and unitarity
We discuss the consistency of fermion mass generation by boundary conditions and brane localized terms in higher dimensional Higgsless models of gauge symmetry breaking. The sum rules imposed by tree-level unitarity and Ward Identities are applied to check the consistency of mass generation by orbifold projections and more general boundary conditions consistent with the variational principle. W...
متن کامل3 decays and CKM unitarity *
We present a detailed numerical study of the Ke3 decays to O(p6, (md −mu)p, ep) in chiral perturbation theory with virtual photons and leptons. We describe the extraction of the CKM matrix element |Vus| from the experimental Ke3 decay parameters. We propose a consistency check of the K + e3 and K 0 e3 data that is largely insensitive to the dominating theoretical uncertainties, in particular th...
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: 2015
ISSN: 1029-8479
DOI: 10.1007/jhep05(2015)005