Regular Article - Theoretical Physics
Decoupling of the right-handed neutrino contribution to the Higgs mass in supersymmetric models
Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, CA, 95064, USA
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Revised: 23 July 2013
Published online: 23 August 2013
Recently, it has been argued that in the supersymmetric extension of the seesaw-extended Standard Model, heavy right-handed neutrinos and sneutrinos may give corrections as large as a few GeV to the mass of the lightest neutral CP-even Higgs boson, even if the soft supersymmetry-breaking parameters are of order the electroweak scale. The presence of such large corrections would render precise Higgs masses incalculable from measurable low-energy parameters. We show that this is not the case: decoupling is preserved in the appropriate sense and right-handed (s)neutrinos, if they exist, have negligible impact on the physical Higgs masses.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013