Chair: H. Päs
Carolina Arbelaez (Univ Técnica Federico Santa Maria)
We construct and analyze nonsupersymmetric SO(10) standard model extensions which explain dark matter (DM) through the fermionic Higgs portal. In these SO(10)-based models, the DM particle is naturally stable since a Z2 discrete symmetry, the matter parity, is left at the end of the symmetry breaking chain to the standard model. Potentially realistic models contain the 10 and 45 fermionic...
Konstantinos Dimopoulos (Lancaster University)
AGN jets carry helical magnetic fields, which can affect dark matter if the latter is axionic. This preliminary study shows that the nature of the axionic condensate may change such that it violates the strong energy condition and becomes localised Dark Energy. The presence of such Dark Energy may affect galaxy formation and galactic dynamics, so this possibility should not be ignored when...
Giovanni Grilli di Cortona (SISSA)
The QCD axion solves the strong CP problem and it is a natural dark matter candidate. Although its mass and couplings are determined by non-perturbative QCD effects I will show that they can be extracted with percent accuracy, partially exploiting the foreseen experimental accuracy in case of discovery. Furthermore I will discuss the unreliability of the usual instanton estimates and study the...
Stephen West (Royal Holloway, University of London)
I will outline models of Nuclear Dark Matter, where the dark matter states are large composite objects consisting of constituent "dark nucleons". I will present some of the details of the possible interactions of these large composite dark matter states with the Standard Model sector. Elastic scattering with SM nuclei can be coherently enhanced by factors as large as A^2, where A is the number...
Fong Chee Sheng (Universidade de São Paulo)
In this talk I will discuss about scenarios where Dark Matter (DM) particles carry baryon and lepton numbers. Clearly the baryon and lepton numbers of the DM particles can be defined only if there exists operators which connect them to the Standard Model (SM) baryons and leptons. As a result the DM particles become intimately linked to the SM particles and can be maximally asymmetric just like...