Dr. Achillefs Lazopoulos

Research area

See also the Theoretical Particle Physics group page

I am interested in perturbative quantum field theory and its application to particle physics phenomenology. My current research topics include:

Effective field theories: every physical theory has its range of validity, and the influence of degrees of freedom from other, very high, energy ranges should be limited, and encapsulated by the renormalization procedure. This can be achieved by using Effective field theories (EFTs). The absence of new physics indications at the LHC seems to imply that any new fundamental particles that might exist lie in the multi-TeV region. All signs of potential new physics are bound to be limited, and are optimally parametrized by an EFT. Different new models affect the parameters of the EFT and their running in a different way. We wish to explore the correspondence between generic new physics models and the Standard Model EFT at the one-loop level and beyond.

Infrared singularities in Quantum Chromo Dynamics: precise comparison with th experimental data is the only way ahead for collider physics in the coming decades. Precision computations are, however, notoriously complicated, largely due to the intricate structure of the infra red singularities in non-abelian gauge theories, and in particular, in QCD. A novel way to organise the treatment of infrared singularities for processes with initial state quarks has recently been proposed. Our goal is to explore how to apply this method to simulate multi-particle physical processes at LHC energies, and to extend it to cover all initial and final state channels.

Other Interests

Economics: With M. Moatsos (Maastricht U.) we have employed Monte Carlo simulation methods to estimate the uncertainty in the World Bank's estimate of the Global Absolute Poverty. 

Popular Science: I am writing a newsletter on current scientific developments for the general public, in Greek, for external pageNema Mediacall_made