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Cosmic strings form at the end of standard supersymmetric hybrid inflation,and both inflation and strings contribute to the CMB anisotropies. If thesymmetry which is broken at the end of inflation is gauged $B$-$L$, there is amixed scenario for leptogenesis: Right-handed neutrinos can be producednon-thermally during reheating via inflaton decay as well as via cosmic stringdecay. We show that the parameter space consistent with CMB data canaccommodate either or both scenarios depending on the mass of the right-handedneutrinos.Comment: 33 pages, 7 figure

Leptogenesis from reheating after inflation and cosmic string decay