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Electroweak Baryogenesis From Dark CP Violation

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arxiv 1811.09719 v1 pith:SZEIFPJA submitted 2018-11-23 hep-ph astro-ph.COhep-ex

classification hep-phastro-ph.COhep-ex
keywords electroweakdarksearchesbaryogenesisgaugemechanismprimeviolation
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abstract

We present a novel mechanism of electroweak baryogenesis where \textit{CP} violation occurs in a dark sector, comprised of standard model gauge singlets, thereby evading the strong electric dipole moment constraints. In this framework, the background of time-like component of a new gauge boson $Z^\prime_\mu$, generated at electroweak temperatures, drives the electroweak sphaleron processes to create the required baryon asymmetry. We first discuss the crucial ingredients for this mechanism to work, and then show that all of them can be elegantly embedded in ultraviolet completions with spontaneously broken gauged lepton number. The models under consideration have a rich phenomenology and can be experimentally probed in leptophilic $Z^\prime$ searches, dark matter searches, heavy Majorana neutrino searches, as well as through hunting for new Higgs portal scalars in multi-lepton channels at colliders.

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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Multi-step Strong First-Order Electroweak Phase Transitions in the Inverted Type-I 2HDM: Parameter Space, Gravitational Waves, and Collider Phenomenology

    hep-ph 2025-06 conditional novelty 7.0 of 10

    In the inverted Type-I 2HDM, one-step and two-step strong first-order electroweak phase transitions live in largely separate parameter regions, and LISA-detectable gravitational wave signals come predominantly from th...

  2. The Discriminant Power of Bubble Wall Velocities: Gravitational Waves and Electroweak Baryogenesis

    hep-ph 2025-04 conditional novelty 6.0 of 10

    Using entropy conservation in local thermal equilibrium, the authors compute bubble wall velocities in singlet-extended models and find a near-universal relation between phase transition strength measures, with conseq...

  3. Thermalization effects on the dynamics of growing vacuum bubbles

    hep-ph 2024-11 conditional novelty 6.0 of 10

    Bubble-wall terminal velocity depends on plasma thermalization; non-equilibrium and free-streaming regimes give slower or different walls, and stationary solutions can be bypassed by runaways.

  4. Does the Electron EDM Preclude Electroweak Baryogenesis ?

    hep-ph 2024-04 unverdicted novelty 6.0 of 10

    First-order gradient CP-violating sources in EWBG quantum transport relax electron EDM bounds and increase viability compared to prior approximations in a model illustration.

  5. Strong first-order phase transitions in the NMSSM --- a comprehensive survey

    hep-ph 2019-08 conditional novelty 6.0 of 10

    In the NMSSM, strong first-order electroweak phase transitions occur in four distinct phase-structure patterns, but only the simultaneous Higgs-singlet transition and the singlet-first-keeping-sign transition are like...

  6. Dark CP Violation and Gauged Lepton/Baryon Number for Electroweak Baryogenesis

    hep-ph 2019-08 conditional novelty 6.0 of 10

    An electroweak baryogenesis model where dark-sector CP violation is transferred to Standard Model leptons through an anomalous U(1)_ℓ Z' background can produce the observed baryon asymmetry while evading current EDM bounds.

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