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We propose a framework where a phase transition associated with a gauge symmetry breaking that occurs (not far) above the electroweak scale sets a stage for baryogenesis similar to the electroweak baryogenesis in the Standard Model. A…

High Energy Physics - Phenomenology · Physics 2022-01-11 Kohei Fujikura , Keisuke Harigaya , Yuichiro Nakai , Isaac R. Wang

We study general aspects of the CP-violating effects on the baryon asymmetry of the Universe (BAU) and electric dipole moments (EDMs) in models extended by an extra Higgs doublet and a singlet, together with electroweak-interacting…

High Energy Physics - Phenomenology · Physics 2016-04-20 Kaori Fuyuto , Junji Hisano , Eibun Senaha

We analyze electroweak baryogenesis during a two-step electroweak symmetry breaking transition, wherein the baryon asymmetry is generated during the first step and preserved during the second. Focusing on the dynamics of CP-violation…

High Energy Physics - Phenomenology · Physics 2016-01-27 Satoru Inoue , Grigory Ovanesyan , Michael J. Ramsey-Musolf

Electroweak baryogenesis (EWBG) remains a theoretically attractive and experimentally testable scenario for explaining the cosmic baryon asymmetry. We review recent progress in computations of the baryon asymmetry within this framework and…

High Energy Physics - Phenomenology · Physics 2015-06-05 David E. Morrissey , Michael J. Ramsey-Musolf

The status of electroweak baryogenesis in the minimal supersymmetric standard model is reviewed. I discuss the strength of the phase transition, CP violation and transport at the bubble walls, and the possibility of a two stage transition…

High Energy Physics - Phenomenology · Physics 2007-05-23 James M. Cline

We describe a new effect which produces baryons at a first order electroweak phase transition. It operates when there is a CP-violating field present on propagating bubble walls. The novel aspect is that it involves a purely classical…

High Energy Physics - Phenomenology · Physics 2010-11-01 Michael Joyce , Tomislav Prokopec , Neil Turok

We reanalyze the issue of generation of the baryon asymmetry at the electroweak phase transition in the MSSM and compute the baryon asymmetry assuming the presence of non-trivial CP-violating phases in the parameters associated with the…

High Energy Physics - Phenomenology · Physics 2009-10-31 Antonio Riotto

We compute the baryon asymmetry created in a tachyonic electroweak symmetry breaking transition, focusing on the dependence on the source of effective CP-violation. Earlier simulations of Cold Electroweak Baryogenesis have almost…

High Energy Physics - Phenomenology · Physics 2018-07-04 Zong-Gang Mou , Paul M. Saffin , Anders Tranberg

In this lecture first I present a brief genesis of the ideas on the electroweak baryogenesis and then I focus on a mechanism in which the source of $CP$ violation is a $CP$-violating field condensate which could occur, for example, in…

High Energy Physics - Phenomenology · Physics 2007-05-23 Tomislav Prokopec

We analyze electroweak baryogenesis in supersymmetric theories with flavor-dependent CP-violating phases. We generalize the standard approach to include the flavor dependence of the CP-violating sources and obtain an analytical approximate…

High Energy Physics - Phenomenology · Physics 2009-11-07 D. Delepine , R. Gonzalez Felipe , S. Khalil , A. M. Teixeira

We investigate electroweak baryogenesis from domain walls with electroweak-symmetric cores moving through the electroweak-broken plasma. In the thick-wall regime, CP-violating semiclassical forces generate chiral asymmetries that source…

High Energy Physics - Phenomenology · Physics 2026-04-21 Jacopo Azzola , Oleksii Matsedonskyi , Andreas Weiler

Electroweak baryogenesis depends on the profile of the bubble wall created in the first-order phase transition. It is pointed out that CP violation in the Higgs sector of the MSSM could become large enough to explain the baryon asymmetry.…

High Energy Physics - Phenomenology · Physics 2009-10-31 Koichi Funakubo , Shoichiro Otsuki , Fumihiko Toyoda

Baryon asymmetry can be generated at the first order electroweak phase transition, provided there is a CP violation on the bubble wall. In this report we discuss the role of leptons and quarks in the `non-local' baryogenesis mechanism.

High Energy Physics - Phenomenology · Physics 2007-05-23 Tomislav Prokopec

We propose a mechanism called sphalerogenesis to explain the baryon asymmetry of the universe (BAU). The BAU is explained by a CP-violating decay of the electroweak sphaleron. We introduce a dimension-six operator constructed from weak…

High Energy Physics - Phenomenology · Physics 2026-05-05 Masanori Tanaka

A possible solution to the observed baryon asymmetry in the universe is described, based on the physics of the standard model of electroweak interactions. At temperatures high enough electroweak physics provides violation of baryon number,…

High Energy Physics - Phenomenology · Physics 2007-05-23 Nicholas Petropoulos

We initiate a study of cosmological implications of sphaleron-mediated CP-violation arising from the electroweak vacuum angle under the reasonable assumption that the semiclassical suppression is lifted at finite temperature. In this…

High Energy Physics - Phenomenology · Physics 2015-08-26 Andrew J. Long , Hiren H. Patel , Mark Trodden

We study a mechanism that generates the baryon asymmetry of the Universe during a tachyonic electroweak phase transition. We utilize as sole source of CP violation an operator that was recently obtained from the Standard Model by…

High Energy Physics - Phenomenology · Physics 2014-11-20 Anders Tranberg , Andres Hernandez , Thomas Konstandin , Michael G. Schmidt

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…

High Energy Physics - Phenomenology · Physics 2019-05-29 Marcela Carena , Mariano Quirós , Yue Zhang

We present a comprehensive, self-contained pedagogical computation of the baryon asymmetry of the Universe within electroweak baryogenesis (EWBG), from the derivation of the semiclassical, CP-dependent force to the formulation and solution…

High Energy Physics - Phenomenology · Physics 2025-11-05 Giulio Barni

Electroweak baryogenesis is an attractive mechanism to generate the baryon asymmetry of the Universe via a strong first order electroweak phase transition. We compare the phase transition patterns suggested by the vacuum structure at the…

High Energy Physics - Phenomenology · Physics 2021-03-12 Sebastian Baum , Marcela Carena , Nausheen R. Shah , Carlos E. M. Wagner , Yikun Wang