Remarks on the Boomerang results, the baryon density, and the leptonic asymmetry - art. no. 081301

The very recent Boomerang results give an estimate of unprecedented precisi on of the cosmic microwave background anisotropies on subdegree scales. A p uzzling feature for theoretical cosmology is the low amplitude of the secon d acoustic peak. Through a qualitative discussion, we argue that a scarcely considered category of flat models, with a leptonic asymmetry, a high bary on density and a low cosmological constant seems to be in very good agreeme nt with the data, while still being compatible with big bang nucleosynthesi s and some other observational constraints. Although this is certainly not the only way to explain the data, we believe that these models deserve to b e included in forthcoming likelihood analyses.