$CP$ violation from $\tau$, $t$ and $b$ dimension-6 Yukawa couplings -- interplay of baryogenesis, EDM and Higgs physics

Abstract

We explore the implications of the Standard Model effective field theory (SMEFT) with dimension-six terms involving the Higgs boson and third-generation fermion fields on the rate of Higgs boson production and decay into fermions, on the electric dipole moments (EDMs) of the electron, and on the baryon asymmetry of the Universe. We study the consequences of allowing these additional terms for each flavor separately and for combinations of two flavors. We find that a complex $\tau$ Yukawa coupling can account for the observed baryon asymmetry $Y_B^{\mathrm{obs}}$ within current LHC and EDM bounds. A complex $b$ ($t$) Yukawa coupling can account for $4\%$ ($2\%$) of $Y_B^{\mathrm{obs}}$, whereas a combination of the two can reach $12\%$. Combining $\tau$ with either $t$ or $b$ enlarges the viable parameter space owing to cancellations in the EDM and in either Higgs production times decay or the total Higgs width, respectively. Interestingly, in such a scenario there exists a region in parameter space where the SMEFT contributions to the electron EDM cancel and collider signal strengths are precisely SM-like, while producing sufficient baryon asymmetry. Measuring $CP$ violation in Higgs decays to $\tau$ leptons is the smoking gun for this scenario.

arXiv comment20 pages + appendix, 5 figures, 3 tables

References in corpus (22)

• Dimension-Six Terms in the Standard Model Lagrangian
• Is There a Hot Electroweak Phase Transition at $m_H\gsim m_W$?
• Standard Model CP-violation and Baryon asymmetry
• Endpoint of the hot electroweak phase transition
• Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
• Updated Global SMEFT Fit to Higgs, Diboson and Electroweak Data
• Supersymmetric Electroweak Baryogenesis
• Constraints on CP-violating Higgs couplings to the third generation
• The Sphaleron Rate in SU(N) Gauge Theory
• Non-local Electroweak Baryogenesis Part I : Thin Wall Regime
• EFT approach to the electron Electric Dipole Moment at the two-loop level
• Electroweak Baryogenesis and the Standard Model Effective Field Theory
• Unveiling CP property of top-Higgs coupling with graph neural networks at the LHC
• The role of leptons in electroweak baryogenesis
• Determination of the Higgs CP mixing angle in the tau decay channels at the LHC including the Drell-Yan background
• Probing the $CP$ nature of the top quark Yukawa at hadron colliders
• Probing CP violation in $h\to {\tau }^{-}{\tau }^{+}$ at the LHC
• Damping rates in the MSSM and electroweak baryogenesis
• New Physics Scale from Higgs Observables with Effective Dimension-6 Operators
• Implications of the upper bound on $\mathbf{h}\to {\mathbf{\mu }}^{+}{\mathbf{\mu }}^{-}$ on the baryon asymmetry of the Universe
• Source terms for electroweak baryogenesis in the vev-insertion approximation beyond leading order
• Probing the CP-Violation effects in the $h\tau \tau$ coupling at the LHC

Cited by in corpus (28)

• Quark level and hadronic contributions to the electric dipole moment of charged leptons in the standard model
• First-order electroweak phase transitions: a nonperturbative update
• Constraining the CP structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis
• Particle Physics at the European Spallation Source
• Probing the CP structure of the top quark Yukawa coupling: Loop sensitivity vs. on-shell sensitivity
• Constraining CP-violation in the Higgs-top-quark interaction using machine-learning-based inference
• Beyond Jarlskog: 699 invariants for CP violation in SMEFT
• A Reduced basis for CP violation in SMEFT at colliders and its application to Diboson production
• Global Constraints on Yukawa Operators in the Standard Model Effective Theory
• Lepton-mediated electroweak baryogenesis, gravitational waves and the $4\tau$ final state at the collider
• A New bound on CP Violation in the $\tau$ Lepton Yukawa Coupling and electroweak baryogenesis
• A Precise Electron EDM Constraint on CP-odd Heavy-Quark Yukawas
• CP-violating Higgs Di-tau Decays: Baryogenesis and Higgs Factories
• Current bounds on baryogenesis from complex Yukawa couplings of light fermions
• Constraining New Physics with Single Top production at LHC
• Electron EDM and $\Gamma (\mu \to e\gamma )$ in the 2HDM
• Analytic Techniques for Solving the Transport Equations in Electroweak Baryogenesis
• Searching for BSM Physics in Yukawa Couplings and Flavour Symmetries
• Bubble Trouble: a Review on Electroweak Baryogenesis
• Probing Effective Field Theory Approach in the CP Violating Minimal Linear $\sigma$ Model
• Sensitivity to $\mathcal{C}\mathcal{P}$-violating effective couplings in the top-Higgs sector
• Improved bounds on ultralight scalar dark matter in the radio-frequency range
• Prospect study for measurement of $Hb\bar{b}$ coupling at the LHC and FCC-hh
• Resummation and cancellation of the VIA source in electroweak baryogenesis
• Exploring CP violation in $H\to {\tau }^{+}{\tau }^{-}\gamma$
• Exploring non-standard $Hb\bar{b}$ interactions at future electron-proton colliders
• Filtered Baryogenesis
• Catalyzed Baryogenesis