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On the terms violating the custodial symmetry in multi-Higgs-doublet models
Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, Department of Physics. Høgskolen i Sør-Trøndelag.
2013 (English)In: Journal of Physics G: Nuclear and Particle Physics, ISSN 0954-3899, E-ISSN 1361-6471, Vol. 40, no 065001, -25 p.Article in journal (Refereed) Published
Abstract [en]

We prove that a generic multi-Higgs-doublet model (NHDM) generally must contain terms in the potential that violate the custodial symmetry. This is done by showing that the O(4) violating terms of the NHDM potential cannot be excluded by imposing a symmetry on the NHDM Lagrangian. Hence we expect higher-order corrections to necessarily introduce such terms. We also note, in the case of custodially symmetric Higgs-quark couplings, that vacuum alignment will lead to up-down mass degeneration; this is not true if the vacua are not aligned.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2013. Vol. 40, no 065001, -25 p.
URN: urn:nbn:no:ntnu:diva-23209DOI: 10.1088/0954-3899/40/6/065001OAI: diva2:659111

© 2013 IOP Publishing Ltd

Available from: 2013-10-24 Created: 2013-10-24 Last updated: 2013-10-24Bibliographically approved

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