f (R)-theories of gravity are reviewed in the framework of the matterantimatter asymmetry in the Universe. The asymmetry is generated by the gravitational coupling of heavy (Majorana) neutrinos with the Ricci scalar curvature. In order that the mechanism works, a time varying non-zero Ricci curvature is necessary. The latter is provided by f (R) cosmology, whose Lagrangian density is of the form L(R) = f (R), with f (R) = R + αR^n.
Consequences of f(R)-theories of gravity on gravitational leptogenesis
LAMBIASE, Gaetano;MOHANTY, SUBHENDRA;PIZZA, LIBERATO
2013-01-01
Abstract
f (R)-theories of gravity are reviewed in the framework of the matterantimatter asymmetry in the Universe. The asymmetry is generated by the gravitational coupling of heavy (Majorana) neutrinos with the Ricci scalar curvature. In order that the mechanism works, a time varying non-zero Ricci curvature is necessary. The latter is provided by f (R) cosmology, whose Lagrangian density is of the form L(R) = f (R), with f (R) = R + αR^n.File in questo prodotto:
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