Phenomenology of a Gauged SU(3)^3 Flavour Model

Abstract

We present an extensive analysis of Delta F=2 observables and of B -> X_s gamma in the framework of a specific Maximally Gauged Flavour (MGF) model of Grinstein et al. including all relevant contributions, in particular tree-level heavy gauge boson exchanges that are considered in the present paper for the first time. The model allows in principle for significant deviations from the Standard Model predictions for epsilon_K, Delta M_{B_{d,s}}, mixing induced CP-asymmetries S_{psi K_S} and S_{psi phi} and B -> X_s gamma decay. The tension between epsilon_K and S_{psi K_S} present in the SM can be removed by enhancing |epsilon_K| without modifying S_{psi K_S}. In this case, we find that in this model i) the results for S_{psi phi} and B -> X_s gamma turn out to be SM-like, ii) the exclusive determination of |Vub| is favoured and most importantly iii) the values of Delta M_{B_d} and Delta M_{B_s} being strongly correlated in this model with epsilon_K turn out to be much larger than the data for the central values of input parameters: Delta M_{B_d}~0.75/ps and Delta M_{B_s}~27/ps. Therefore, from the present perspective, the model suffers from a serious epsilon_K-Delta M_{B_{d,s}} tension. However, this tension can be softened considering theoretical and parametric uncertainties and in particular the decrease of the weak decay constants. On the other side, the model can be strongly constrained considering the theoretically cleaner ratios Delta M_{B_d}/Delta M_{B_s} and BR(B^+ -> tau^+ nu)/Delta M_{B_d} and we find that it is unable to remove simultaneously all the SM tensions on the data. Finally, we compare the pattern of flavour violation in MGF with selected extensions of the SM.

43 pages, 9 figures; version published on JHEP

References in corpus (25)

• Hints of large tan(beta) in flavour physics
• Anatomy of New Physics in B-Bbar mixing
• Next-to-Next-to-Leading-Order Charm-Quark Contribution to the CP Violation Parameter epsilon_K and Delta M_K
• Correlations among new CP violating effects in Delta F = 2 observables
• Possible Indications of New Physics in Bd-mixing and in sin(2 beta) Determinations
• Twisted mass lattice QCD
• Epsilon_K at Next-to-Next-to-Leading Order: The Charm-Top-Quark Contribution
• Measurement of the CP-violating phase ${\varphi }_s^{J/\psi \varphi }$ using the flavor-tagged decay $B_s^0\to J/\psi \varphi$ in 8 fb${}^{-1}$ of $p \barp$ collisions
• Various definitions of Minimal Flavour Violation for Leptons
• Possible evidence for the breakdown of the CKM-paradigm of CP-violation
• The $K\to (\pi \pi {)}_{I=2}$ Decay Amplitude from Lattice QCD
• Low Scale Flavor Gauge Symmetries
• Continuum Limit of $B_K$ from 2+1 Flavor Domain Wall QCD
• Neutral kaon mixing from 2+1 flavor Domain Wall QCD
• Minimal flavour violation extensions of the seesaw
• Delta F = 2 observables and B -> X_q gamma decays in the Left-Right Model: Higgs particles striking back
• On The Potential of Minimal Flavour Violation
• K^0-\bar K^0 mixing beyond the standard model and CP-violating electroweak penguins in quenched QCD with exact chiral symmetry
• $B_K$ using HYP-smeared staggered fermions in $N_f=2+1$ unquenched QCD
• Gauged Flavor Group with Left-Right Symmetry
• BK-parameter from Nf = 2 twisted mass lattice QCD
• On the consistency between the observed amount of CP violation in the K- and Bd-systems within minimal flavor violation
• See-Saw Masses for Quarks and Leptons in SU(5)
• Flavour violation in a supersymmetric T' model
• Theoretical status of the CKM Matrix

Cited by in corpus (45)

• Towards the Identification of New Physics through Quark Flavour Violating Processes
• Minimal Flavour Violation and Beyond
• Dark matter within the minimal flavour violation ansatz
• The Minimal Flavour Violating Axion
• Flavour with a Light Dynamical "Higgs Particle"
• Universal Unitarity Triangle 2016 and the Tension Between $\Delta M_{s,d}$ and ${\epsilon }_K$ in CMFV Models
• Neutrino Mixings and the S4 Discrete Flavour Symmetry
• Neutral kaon mixing beyond the standard model with nf=2+1 chiral fermions
• Complete NLO QCD Corrections for Tree Level Delta F = 2 FCNC Processes
• Universal Constraints on Low-Energy Flavour Models
• Gauging the Way to MFV
• Leptonic Dynamical Yukawa Couplings
• Dynamical Minimal Flavour Violating Inverse Seesaw
• Neutrino Masses and Hubble Tension via a Majoron in MFV
• Revisiting Minimal Lepton Flavour Violation in the Light of Leptonic CP Violation
• Gauged Lepton Flavour
• Stringent Tests of Constrained Minimal Flavour Violation through Delta F=2 Transitions
• Distinguishing A Higgs-Like Dilaton Scenario With A Complete Bosonic Effective Field Theory Basis
• Higgs-flavon mixing and LHC phenomenology in a simplified model of broken flavor symmetry
• Baryon Non-Invariant Couplings in Higgs Effective Field Theory
• On the Correlations between Flavour Observables in Minimal U(2)^3 Models
• Dark Matter and Gauged Flavor Symmetries
• Predictive Leptogenesis from Minimal Lepton Flavour Violation
• A New bound on CP Violation in the $\tau$ Lepton Yukawa Coupling and electroweak baryogenesis
• Gauged flavour symmetry for the light generations
• Spectroscopy of Family Gauge Bosons
• Searching for BSM Physics in Yukawa Couplings and Flavour Symmetries
• Lepton Flavor Violation and Neutrino Masses from $A_5$ and CP in the Non-Universal MSSM
• Data Driven Flavour Model
• Neutrino Mass Matrix Model with a Bilinear Form
• Yukawaon Model with Anomaly Free Set of Quarks and Leptons in a U(3) Family Symmetry
• Quark and Lepton Mass Matrix Model with Only Six Family-Independent Parameters
• Universal Bilinear Form of Quark and Lepton Mass Matrices
• Flavon VEV Scales in U(3)$\times$U(3)${}^{\prime }$ Model
• Origin of Hierarchical Structures of Quark and Lepton Mass Matrices
• Neutrino and Charged Lepton Flavour Today
• $SU(3{)}_F$ Gauge Family Model and New Symmetry Breaking Scale From FCNC Processes
• A common origin of the Higgs boson and the flavor hierarchies
• Can Mass of the Lightest Family Gauge Boson be of the Order of TeV?
• Quark and Lepton Mass Matrices Described by Charged Lepton Masses
• Leptonic $CP$ violating Phase in the Yukawaon Model
• A Light Dynamical Scalar Boson
• A Bottom-Up Approach: The Data Driven Flavour Model
• Higgs boson physics and broken flavor symmetry -- LHC phenomenology
• Neutrino Masses and Mixings from Continuous Symmetries