The chemical equilibrium in the early Universe dynamically evolves in dependence of the steadily decreasing temperature of the Standard Model plasma. At high temperatures, when the rate of many Standard Model interactions cannot compete with the fast expansion rate, the chemical transport in the plasma is in particular characterized by a large number of global charges that only become violated at lower temperatures. This observation leads to a new perspective on the necessary conditions for the successful generation of the baryon asymmetry of the Universe (BAU). As I will show in this talk, it turns out that the BAU cannot only be generated in "baryogenesis" or "baryogenesis via leptogenesis", but also in "baryogenesis via leptogenesis via chargegenesis", which starts out from the generation of one or several of the many global charges that are available at high temperatures. This new scenario significantly relaxes the Sakharov conditions and opens up a new window to a plethora of model-building opportunities. As an example of "chargegenesis", I will consider axion inflation, which can give rise to global charges at high temperatures that are subsequently converted by right-handed-neutrino interactions to a new B-L-violating chemical equilibrium at low temperatures. In the last part of the talk, I will discuss how this new mechanism of B-L violation ("wash-in leptogenesis", see 2011.09347) can be generalized to the generation of flavored B-L charges, even if the total B-L charge remains zero in all sectors and at all times ("wash-in leptoflavorgenesis", see 2111.03082). In both cases, weak sphaleron processes are then responsible for the final conversion from (flavored) baryon-minus-lepton number to baryon number.
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Iñaki Lara Pérez (IFT UW)
The μνSSM is the minimal supersymmetric extension of the standard model capable of solving the mu problem of the MSSM and generating neutrino masses, through an R-parity violating coupling between Higgs superfields and righ-handed neutrino superfields.The smallness of the neutrino Yukawa coupling, necessary for generating correct neutrino physics, dictates the size of the R-parity violating (RPV) interactions. We analyze the implications for the model of the last published MUON G-2 result, as well as the LHC constraints over the top superpartner as the LSP of the model.
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Roberto Vega-Morales (Granada University)
Building on recently introduced inflationary vector dark matter production mechanisms as well as electromagnetic Schwinger production mechanisms which take place during inflation, we show that an inflationary dark Schwinger mechanism can generate the observed dark matter relic abundance. This dark Schwinger mechanism can lead to a multi-component dark matter sector which is comprised of some mixture of dark vectors, dark charged scalars and, in principle, dark fermions that interact amongst themselves.
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