1 Baryon asymmetry can be generated at the first order electroweak phase transition, provided there is a CP violation on the bubble wall. In this report we discuss the role of leptons and quarks in the ‘non-local’ baryogenesis mechanism. It is quite a remarkable fact that baryogenesis may have occurred at the electroweak phase transition [1] with a minimal extension of the Higgs sector, in orde...

This contribution presents recent results on the production and the spectroscopy of charmed baryons in the hyperon beam experiment WA89 at CERN. The results are based on a data set of 100 Million interaction triggers from the rst data taking in 1991. Diierential and total cross-sections have been determined for charmed (non-strange) baryon production in the forward direction and suggest leading...

The origin of the baryon asymmetry of the Universe is one of the key open questions to be addressed in particle physics and cosmology. Assuming a negligible initial baryon asymmetry, its dynamical production can happen in presence of non-conservation of the baryon and/or lepton number, violation of the C and CP symmetries and out-of-equilibrium conditions. Leptogenesis is a mechanism, proposed ...

Baryon production is one of the least understood areas of hadron production in electron positron collisions. Early models of hadronization predicted that very few baryons should be produced. However, experiments have shown a very substantial rate of baryon production, and many different models have been proposed to explain this. One way to test these models, and to further probe the hadronizati...