منابع مشابه
Constraints on mSUGRA from isospin asymmetry in B →
We study the isospin asymmetry as an observable in exclusive B→K∗γ decay that can be used to study the effects of physics beyond the Standard Model. We present predictions for isospin asymmetry in Supersymmetric extension of the Standard Model with minimal flavor violation, using parameter values allowed by current experimental constraints. This observable can provide very tight constraints on ...
متن کاملSupersymmetric parameter constraints from isospin asymmetry in b → sγ transitions
Isospin asymmetry in b → sγ transitions provides severe constraints on new physics parameters, due to the small values of the experimental measurements. We exploit here this new observable to study different supersymmetric models. For this purpose, we calculate the isospin symmetry breaking in the MSSM with minimal flavor violation, considering NLO contributions. We study three scenarios for su...
متن کاملIsospin Violation in B! Decays
An isospin analysis of B ! decays yields sin 2 , where is the usual CKM angle arg[ VtdV tb=(VudV ub)] without hadronic uncertainty if isospin is a perfect symmetry. Yet isospin symmetry is broken not only by electroweak e ects but also by the u and d quark mass di erence | the latter drives 0 ; 0 mixing and converts the isospin-perfect triangle relation between the B ! amplitudes to a quadrilat...
متن کاملConstraints on the Msugra Parameter Space from Nlo Calculation of Isospin Asymmetry in B → K * Γ
The contributions of supersymmetric particles in the isospin symmetry violation in B → K * γ decay mode are investigated. The model parameters are adopted from minimal Supergravity with minimal flavor violation. A complete scan of the mSUGRA parameter space has been performed, using the next to leading supersymmetric contributions to the relevant Wilson coefficients. The results are compared to...
متن کاملISOSPIN VIOLATION IN HADRONIC B-DECAYS a
I present two disparate examples of isospin violation in hadronic B-decays. In the first, the presence of ρ 0-ω mixing in the decay B ∓ → ρ ∓ ρ 0 (ω) → ρ ∓ π + π − permits the extraction of sgn(sin α), where α is the usual angle of the unitarity triangle, with minimal hadronic uncertainty. In the second, the presence of π 0-η, η ′ mixing can obscure the extraction of sin 2α from an isospin anal...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2005
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s2005-02119-y