Phys. Rev. D 66, 053001 (2002) [9 pages]Seesaw mechanism, baryon asymmetry, and neutrinoless double beta decayReceived 10 May 2002; published 10 September 2002 A simplified but very instructive analysis of the seesaw mechanism is here performed. Assuming a nearly diagonal Dirac neutrino mass matrix, we study the forms of the Majorana mass matrix of right-handed neutrinos, which reproduce the effective mass matrix of left-handed neutrinos. As a further step, the important effect of a nondiagonal Dirac neutrino mass matrix is explored. The corresponding implications for baryogenesis via leptogenesis and for the neutrinoless double beta decay are reviewed. We propose two distinct models where the baryon asymmetry is enhanced. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.66.053001
DOI:
10.1103/PhysRevD.66.053001
PACS:
13.35.Hb, 12.15.Ff
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