2015
DOI: 10.1103/physrevd.92.033006
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Natural leptogenesis and neutrino masses with two Higgs doublets

Abstract: The minimal Type I see-saw model cannot explain the observed neutrino masses and the baryon asymmetry of the Universe via hierarchical thermal leptogenesis without ceding naturalness. We show that this conclusion can be avoided by adding a second Higgs doublet with tan β 4. The models considered naturally accommodate a SM-like Higgs boson, and predict TeV-scale scalar states and low-to intermediate-scale hierarchical leptogenesis with 10 3 GeV MN 1 10 8 GeV.

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Cited by 45 publications
(71 citation statements)
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“…However, this optimization can only enlarge K 1 and cannot be continued to arbitrarily small values of λ 5 . As we will see, using λ 5 in this way also increases the ΔL ¼ 2 washout [51], which will, in combination with the electroweak sphalerons dropping out of equilibrium, eventually provide us with an absolute lower bound on M 1 .…”
Section: A Analytical Insightsmentioning
confidence: 99%
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“…However, this optimization can only enlarge K 1 and cannot be continued to arbitrarily small values of λ 5 . As we will see, using λ 5 in this way also increases the ΔL ¼ 2 washout [51], which will, in combination with the electroweak sphalerons dropping out of equilibrium, eventually provide us with an absolute lower bound on M 1 .…”
Section: A Analytical Insightsmentioning
confidence: 99%
“…More detailed studies were subsequently presented in Refs. [48][49][50][51]. However, it seems that none of these studies is fully exhaustive.…”
mentioning
confidence: 99%
See 1 more Smart Citation
“…A tuning would be necessary to explain the measured Higgs mass, see Ref. [10][11][12][13][14][15][16][17][18][19][20][21] for recent discussions. Moreover, none of the type I, II, and III seesaw fields has a clear theoretical motivation.…”
Section: Introductionmentioning
confidence: 99%
“…Some attempts have been made to improve the 2HDM by addressing dark matter [16][17][18][19][20][21][22][23][24], neutrino masses [25][26][27][28], among others interesting observables. In this work we are interested in 2DHM featuring an additional gauge symmetry.…”
Section: Introductionmentioning
confidence: 99%