REVIEW 11 cited by
The Scalar Singlet Extension of the Standard Model: Gravitational Waves versus Baryogenesis
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
We study the possible gravitational wave signal and the viability of baryogenesis arising from the electroweak phase transition in an extension of the Standard Model (SM) by a scalar singlet field without a $\mathbb{Z}_2$ symmetry. We first analyze the velocity of the expanding true-vacuum bubbles during the phase transition, confirming our previous finding in the unbroken $\mathbb{Z}_2$ symmetry scenario, where the bubble wall velocity can be computed from first principles only for weak transitions with strength parameters $\alpha \lesssim 0.05$, and the Chapman-Jouguet velocity defines the maximum velocity for which the wall is stopped by the friction from the plasma. We further provide an analytical approximation to the wall velocity in the general scalar singlet scenario without $\mathbb{Z}_2$ symmetry and test it against the results of a detailed calculation, finding good agreement. We show that in the singlet scenario with a spontaneously broken $\mathbb{Z}_2$ symmetry, the phase transition is always weak and we see no hope for baryogenesis. In contrast, in the case with explicit $\mathbb{Z}_2$ breaking there is a region of the parameter space producing a promising baryon yield in the presence of CP violating interactions via an effective operator involving the singlet scalar and the SM top quarks. Yet, we find that this region yields unobservable gravitational waves. Finally, we show that the promising region for baryogenesis in this model may be fully tested by direct searches for singlet-like scalars in di-boson final states at the HL-LHC, combined with present and future measurements of the electron electric dipole moment.
Forward citations
Cited by 11 Pith papers
-
Theoretical uncertainties in reconstructing model parameters with gravitational waves from supercooled phase transitions
In the conformal U(1)_X model, the daisy-resummed nucleation scheme shifts LISA-reconstructed gauge couplings by O(10%) relative to the NLO effective-field-theory result, an order of magnitude above the Fisher-matrix ...
-
Scalar Lie point symmetries of the Standard Model with one or two real gauge singlets
SM+S has four and SM+2S has eleven inequivalent maximal scalar Lie point symmetry algebras of the field equations, with parameter-based algorithms to identify them.
-
Complementarity of gravitational wave analyses and di-Higgs production in the exploration of the Electroweak Phase Transition dynamics in the RxSM
In the real singlet extension of the SM, strong first-order electroweak phase transitions split into singlet-driven transitions (loud in gravitational waves, quiet at colliders) and doublet-driven transitions (visible...
-
Dark Sector Electroweak Baryogenesis In Light Of The Galactic Center Excess
A dark-sector electroweak baryogenesis model with a ~50 GeV fermionic dark matter candidate can simultaneously match the baryon asymmetry, the dark matter relic density, and (at ~2 sigma) the galactic center gamma-ray...
-
Unveiling the inert Triplet desert region with a pNGB Dark Matter and its Gravitational Wave signatures
A two-component dark matter model combining an inert scalar triplet with a pseudo-Goldstone singlet revives the sub-TeV triplet desert region and predicts gravitational waves detectable by LISA, BBO, and DECIGO.
-
Investigating a strong first-order electroweak phase transition in the RxSM at future linear $e^+e^-$ colliders and LISA
In the RxSM, singlet-driven SFOEWPTs yield strong LISA GW signals with SM-like Higgs couplings, while doublet-driven ones yield large κ_λ deviations visible at ILC1000 but weak GWs.
-
Electroweak Baryogenesis: Advances in Sphaleron Rate Calculations and Implications of Thermal Phase Transitions
Sphaleron rates can be computed gauge-invariantly in 3D thermal EFT, yielding a new baryon-washout criterion x = lambda3/g3^2 that replaces v_c/T_c > 1 for electroweak baryogenesis.
-
A Non-Holomorphic Modular $A_4$ Framework for Resonant Leptogenesis with Gravitational Wave Signatures
A non-holomorphic modular A4 seesaw model yields quasi-degenerate right-handed neutrinos, enabling resonant leptogenesis at ~10^6 GeV and a double-peaked gravitational-wave signature.
-
The Bubble Wall Velocity in Local Thermal Equilibrium and Energy Budget with Full Effective Potential
Using the full one-loop effective potential with the LTE approximation, the authors find that for xSM deflagration, bag-model gravitational wave peak predictions can differ by up to 48% in frequency and 90% in amplitu...
-
Revisiting Singlet Fermion Dark Matter with a Scalar Portal: Connecting Higgs Phenomenology and Strong Electroweak Phase Transition
In a no-VEV singlet scalar + singlet fermion dark matter extension of the SM, a strong first-order electroweak phase transition, the observed dark matter relic density, and collider/direct-detection constraints can co...
-
Gamma-Rays and Gravitational Waves from Inelastic Higgs Portal Dark Matter
An inelastic complex-scalar Higgs portal dark matter model can evade direct detection, explain the Galactic Center gamma-ray excess, and produce a first-order electroweak phase transition with a gravitational wave sig...
Discussion (0). Sign in to comment.