Conformal window on the lattice

CSC (Grand Challenge) / Kari Rummukainen

The Standard Model of particle physics has been extremely successful in describing the results from particle physics experiments. However, one of the major particles in it, the Higgs particle, has not yet been found, and it is not clear what properties does it have. There are already hints for physics which goes beyond the Standard Model from astrophysical observations and also from theoretical analysis. Indeed, it is widely expected that the LHC collider at CERN will find signs of this "new physics". Technicolor is one of the most favoured candidate theories for "new physics". In these theories the Higgs particle is substuted with a tightly bound state of two technifermions. To test the viability of the technicolor models, we study their properties with large scale lattice Monte Carlo simulations. These simulations are essential for testing the viability of the models, and also for discovering the experimental signals the models have, for example, what kind of exotic particles the theories possess. The simulations have significant theoretical and phenomenological impact.