Violation of the Appelquist-Carazzone decoupling in non-SUSY GUT
| Autor: | Chankowski, Piotr H., Wagner, Jakub |
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| Rok vydání: | 2007 |
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| Zdroj: | Phys.Rev.D77:025033,2008 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.77.025033 |
| Popis: | 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 $\mathbf{24}$ Higgs multiplet the Appelquist-Carazzone decoupling is violated. This is because the $SU(2)_L$ Higgs triplet contained in the $\mathbf{24}$ 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. Comment: 17 pages, no figures |
| Databáze: | arXiv |
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