Grupo de Altas Energías en la Onubense

There are two main frameworks embodying the different topics devoloped in this field:

Electroweak and neutrino physics: we researched on several aspects of the (old-fashioned) SU(2)xU(1)-->U(1) Cosmological Electroweak phase transition and on describing massless fermions (neutrinos in particular) that propagate through high-dense matter (compact objects as neutrons stars).
Quantum Cromo-dynamics: we study the " running" of the QCD coupling constant all over the momentum renormalisation range by comparing non-perturbative computations (Lattice ) and perturbative + O.P.E. predictions for several gluon Green functions. We exploit and check SVZ sum rules in this context. A very precise estimate of the Lambda parameter (the natural QCD energy scale induced by the renormalisation procedure) and the impact of the two-dimension gluon condensate < A 2 > emerge from this study. We investigate on this gauge-dependent condensate and its implications in connection, for instance, with the semi-classical background gauge field given by instanton models. Other research topics are Hadron light-cone wave functions in lattice, semileptonic decays, Ward identities ...