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shaikh saad (University of Basel)11/04/2023, 16:30BSM TheoryInvited talk
Motivated by the direct discovery of gravitational waves (GWs) from black holes and neutron stars, there is a growing interest in investigating GWs from other sources. Among them, GWs from cosmic strings are particularly fascinating since they naturally appear in a large class of grand unified theories (GUTs). Remarkably, a series of pulsar-timing arrays (PTAs) might have already observed GWs...
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Dr Vasja Susič (Charles University)11/04/2023, 16:52BSM TheoryInvited talk
We present the latest progress in analyzing the minimal potentially realistic non-supersymmetric $\mathrm{SO}(10)$ GUT model, whose scalar sector consists of representations $45+126+10$. Although the model is expected to give a robust proton decay prediction, any analysis is hampered by tachyonic instabilities present in the tree-level scalar potential. The one-loop corrected effective...
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Prof. Raymond Volkas (The University of Melbourne)11/04/2023, 17:14BSM TheoryInvited talk
I will briefly discuss two ideas in dark matter model building. They first is that axion dark matter may be connected with neutrino mass generation, baryogenesis and flavour-dependent Higgs Yukawa couplings. The second arises within a continuing search for a good theory of the dark matter mass scale in the asymmetric dark matter paradigm. In particular, I will present some recent results on...
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Prof. Josef Pradler (University of Vienna & Austrian Academy of Sciences (AT))11/04/2023, 17:36BSM TheoryInvited talk
In this talk, we consider the phenomenology of electrically neutral complex vector particles V with a mass below the GeV-scale, but with higher dimensional form factor interactions to the SM photon. The astrophysics, cosmology and direct detection phenomenology will be presented.
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Giovanni Villadoro (Abdus Salam Int. Cent. Theor. Phys. (IT))12/04/2023, 14:30BSM Theory
We strengthen the cosmological bound on the axion mass, by solving the momentum-dependent Boltzmann equations for axion-pion scatterings and by using a phenomenological production rate derived from pion-pion scattering data, overcoming the breakdown of chiral perturbation theory. Using present cosmological datasets we obtain m_a < 0.24 eV. To further improve the bound and exploit the reach of...
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Margarida Nesbitt Rebelo (Instituto Superior Tecnico (IST))12/04/2023, 14:52BSM TheoryInvited talk
We discuss examples of three Higgs doublet models which can provide good dark matter candidates. The emphasis is on models with S_3 symmetry, with or without spontaneous CP violation. Some aspects of the Weinberg potential will also be discussed.
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Ilja Doršner (University of Split)12/04/2023, 15:14BSM TheoryInvited talk
I discuss the impact of triple-leptoquark interactions on matter stability for two specific proton decay topologies that arise at the tree- and one-loop level if and when they coexist. I furthermore demonstrate that the one-loop level topology is, in such an instance, much more relevant than the tree-level one despite the usual loop-suppression factor. To support that claim I present detailed...
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Mathias Becker (JGU Mainz)13/04/2023, 10:19BSM TheoryInvited talk
A non-minimal dark sector could explain why WIMP dark matter has evaded detection so far. Based on the extensively studied example of a simplified t-channel dark matter model involving a colored mediator, we demonstrate that the Sommerfeld effect and bound state formation must be considered for an accurate prediction of the relic density and thus also when inferring the experimental...
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Francesco Sannino (Syddansk Universitet (DK))13/04/2023, 11:10BSM TheoryInvited talk
We critically analyse the future of composite dynamics via the impact of non standard model Higgs on the (non) observed g-2 and W-mass anomalies.
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Giacomo Cacciapaglia (Centre National de la Recherche Scientifique (FR))13/04/2023, 11:32BSM Theory
The ultimate dream of unification models consists in combining both gauge and Yukawa couplings into one unified coupling. This is achieved by using a supersymmetric exceptional ${\rm E}_6$ gauge symmetry together with asymptotic unification in compact five-dimensional space-time. The ultraviolet fixed point requires exactly three fermion generations: one in the bulk, and the two light ones...
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Axel Torsten Maas13/04/2023, 11:54BSM TheoryInvited talk
Subtle, but long-known, field-theoretical aspects require a more refined treatment of gauge theories involving a Brout-Englert-Higgs effect. This refinement can be analytically done using the Fröhlich-Morchio-Strocchi mechanism. In the standard model, this leads to slight, but in principle detectable, quantitative changes in observables. For many theories beyond the standard model, the effects...
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Dr Diego Redigolo (CERN-INFN Florence)13/04/2023, 12:16BSM and Precision PhysicsInvited talk
I will discuss how dark matter long range interactions with itself or with the baryons leave unique signatures in precision cosmological observables. I will present exquisitely sensitive probes of these interactions in galactic surveys and in 21cm cosmology and discuss the challenges of the theory predictions.
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Raffaele D'Agnolo14/04/2023, 09:57BSM TheoryInvited talk
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