Violation of the Appelquist-Carazzone decoupling in non-SUSY GUT

Abstract

We point out that in non supersymmetric GUTs, in which the SU(5) gauge symmetry is broken down to the Standard Model gauge group by a $24$ Higgs multiplet the Appelquist-Carazzone decoupling is violated. This is because the $SU(2{)}_L$ Higgs triplet contained in the $24$ acquires a dimensionfull coupling to the $SU(2{)}_L$ Higgs doublets which is proportional to the GUT breaking vacuum expectation value (VEV) $V$. As a result, at one loop heavy gauge and Higgs fields contribution to tadpoles generate a VEV of the triplet which is not suppressed for $V\to \infty$ and violates the custodial symmetry.

arXiv comment17 pages, no figures

References in corpus (14)

• One-loop Radiative Corrections to the rho Parameter in the Littlest Higgs Model
• Seesaw at LHC
• Unification without supersymmetry: neutrino mass, proton decay and light leptoquarks
• Probing seesaw at LHC
• Upper Bound on the Mass of the Type III Seesaw Triplet in an SU(5) Model
• Z' and the Appelquist-Carrazzone decoupling
• Phenomenological and Cosmological Aspects of a Minimal GUT Scenario
• Disguising the Oblique Parameters
• Higgs Triplets and Limits from Precision Measurements
• (Non)decoupling of the Higgs triplet effects
• Low energy threshold corrections to neutrino masses and mixing angles
• Constraining New Models with Precision Electroweak Data
• Tree-Level Nondecoupling and the Supersymmetric Higgs Sector
• Minimal Realistic SU(5) Scenario

Cited by in corpus (6)

• Radiative corrections to electroweak parameters in the Higgs triplet model and implication with the recent Higgs boson searches
• Triplet Extended Supersymmetric Standard Model
• Higgs Triplets, Decoupling, and Precision Measurements
• Low-Energy Effective Theory, Unitarity, and Non-Decoupling Behavior in a Model with Heavy Higgs-Triplet Fields
• Renormalization of the Higgs sector in the triplet model
• Electroweak Corrections from Triplet Scalars