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arXiv · 1903.03631

Consistency of the dynamical high-scale type-I seesaw mechanism

Sanjoy Mandal·Rahul Srivastava·José W. F. Valle
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Abstract

We analyze the consistency of electroweak breaking within the simplest high-scale Standard Model type-I seesaw mechanism. We derive the full two-loop RGEs of the relevant parameters, including the quartic Higgs self-coupling of the Standard Model. For the simplest case of bare "right-handed" neutrino mass terms we find that, with large Yukawa couplings, the Higgs quartic self-coupling becomes negative much below the seesaw scale, so that the model may be inconsistent even as an effective theory. We show, however, that the "dynamical" type-I high-scale seesaw with spontaneous lepton number violation has better stability properties.

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Sanjoy Mandal, Rahul Srivastava, José W. F. Valle. 2019-03-08. Consistency of the dynamical high-scale type-I seesaw mechanism. https://doi.org/10.1103/physrevd.101.115030

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