The anatomy of quark flavour observables in 331 models in the flavour precision era
By Andrzej Buras, F. Fazio, J. Girrbach, M. Carlucci. 2012
190 citations recorded by the source corpus.
A bstractThe coming flavour precision era will allow to uncover various patterns of flavour violation in different New Physics (NP) scenarios that are presently washed out by hadronic and experimental uncertainties. We illustrate this by performing the anatomy of flavour violation in the 331 models, based on the gauge group SU(3)C ×SU(3)L ×U(1)X that are among the simplest NP scenarios with new sources of flavour and CP violation. The latter originate dominantly through the flavour violating interactions of ordinary quarks and leptons with a new heavy Z′ gauge boson. After discussing first these models in some generality, we present a detailed study of ΔF = 2 observables and of rare K and B meson decays in the specific “$ \beta ={1 \left/ {{\sqrt{3}}} \right.} $” model (to be called $ \overline{331} $ model) assuming significantly smaller uncertainties in CKM and hadronic parameters than presently available. The most prominent roles in our analysis play εK, ΔMq (q = d, s), the mixing induced CP asymmetries $ {S_{{\psi {K_S}}}} $ and Sψφ, rare decays Bs,d → μ+μ− and in particular the CP-asymmetry $ S_{{{\mu^{+}}{\mu^{-}}}}^s $ in Bs → μ+μ−. As the phenomenology of Z′ contributions is governed only by MZ′ and four new parameters $ {{\widetilde{s}}_{13 }},{{\widetilde{s}}_{23 }} $, δ1 and δ2, we identify a number of correlations between various observables that differ from those known from CMFV models. While, the ΔF = 2 observables allow still for four oases in the new parameter space, we demonstrate how the inclusion of ΔF = 1 observables can in the future identify the optimal oasis for this model. Favouring the inclusive value of |Vub|, for 1 TeV ≤ MZ′ ≤ 3 TeV, the $ \overline{331} $ model is in good agreement with the recent data for B+ → τ+ντ , it removes the $ {\varepsilon_K}-{S_{{\psi {K_S}}}} $ tension present in the SM and the εK − ΔMs,d tension present in CMFV models. Simultaneously, while differing from the SM, it is consistent with the present data on $ \mathcal{B}\left( {{B_{s,d }}\to {\mu^{+}}{\mu^{-}}} \right) $ and Sψφ. We identify the triple correlation $ \mathcal{B}\left( {{B_{s,d }}\to {\mu^{+}}{\mu^{-}}} \right)-{S_{{\psi \phi }}}-S_{{{\mu^{+}}{\mu^{-}}}}^s $ that constitutes an important test of this NP scenario.
Subfields: Artificial Intelligence, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/f2ce8a3a1ea714786b61b5716f9c672bcac8c3d0
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Citations in the corpus
- 331 models facing new b → sμ+μ− data (2013, methodology): “While for the models in question these new flavour data are a big disappointment, for other models like the ones with constrained minimal flavour violation (CMFV), 331 models [2] and Littlest Higgs Model with T-parity [3] they brought a relief as in these models NP effects were naturally predicted t”
- An explicit Z′-boson explanation of the B → K∗μ+μ− anomaly (2013, result): “in agreement with the results presented in [21].”
- Patterns of flavour violation in models with vector-like quarks (2016, background): “2 of [37], although this point has not been made there.”