PLANCK2025 - The 27th International Conference From the Planck Scale to the Electroweak Scale

Session

Reheating and Baryongenesis

29 May 2025, 14:20

Conveners

Reheating and Baryongenesis

• Antonio Masiero (DFA UniPD)

22. Non-singular solutions to the Boltzmann equation with a fluid Ansatz

Gláuber Dorsch (Universidade Federal de Minas Gerais (UFMG), Brazil)

29/05/2025, 14:20

Cosmological phase transitions can give rise to intriguing phenomena, such as baryogenesis and stochastic gravitational wave backgrounds, due to nucleation and percolation of vacuum bubbles in the primordial plasma. A key parameter for predicting the amount of these relics is the bubble wall velocity, whose computation relies on solving the Boltzmann equations of the various species in the...

112. Dynamical origin of neutrino masses and dark matter from a new confining sector

Maximilian Berbig (IFIC & University of Valencia)

29/05/2025, 14:40

A dynamical mechanism, based on a confining non-Abelian dark symmetry, which generates Majorana masses for hyperchargeless fermions, is proposed. We apply it to the inverse seesaw scenario, which allows us to generate light neutrino masses from the interplay of TeV-scale pseudo-Dirac mass terms and a small explicit breaking of lepton number. A single generation of vectorlike dark quarks,...

184. Baryogenesis from bubble collisions

Kristjan Müürsepp (NICPB, Tallinn and LNF-INFN, Frascati)

29/05/2025, 15:00

In this talk I will consider models connecting baryogenesis with first order phase transition. In particular, I will elaborate on scenarios where the required amount of CP-violation originates from the production of heavy particles after true vacuum particles collide. I will focus on the case when both heavy particles are produced on-shell as well as the opposite regime when one of the heavy...

48. Minimal Electroweak Baryogenesis with Domain Walls

Jacopo Azzola (Technische Universität München)

29/05/2025, 15:20

We propose a novel mechanism for Electroweak Baryogenesis (EWBG) within the real singlet extension of the Standard Model with an approximate ℤ2 symmetry. Domain walls associated with the spontaneous breaking of the ℤ2 symmetry feature restored (or weakly broken) EW symmetry in their core. In combination with a CP-violating source, the walls sweeping through space generate the baryon asymmetry...

31. Search for Baryogenesis and Dark Matter in $B$-meson decays at $BABAR$

Isabella Garzia (INFN Sezione di Ferrara and University of Ferrara)

29/05/2025, 15:40

We present the most recent $BABAR$ searches for reactions that could simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts exotic $B$-meson decays of the kind $B\to\psi_{D} {\cal B}$, where $\cal{B}$ is an ordinary matter baryon (proton, $\Lambda$, or $\Lambda_c$) and $\psi_D$ is a dark-sector anti-baryon, with branching...