Abstract
We study the possibilities and the implications of a spontaneous breakdown of charge in the MSSM and in the Z3-symmetric NMSSM. The breakdown is triggered by the charged states of the Higgs doublets acquiring vacuum expectation values. In the MSSM, it is known that the presence of a charge conserving minimum for the tree-level Higgs potential precludes a deeper (global) charge-breaking minimum. We find that the inclusion of radiative correction to the potential does not alter the situation while a deeper charge-conserving minimum could arise, albeit with no major practical consequences. In the NMSSM scenario, a charge-breaking global minimum, with or without an accompanying charge-conserving deeper minimum, could appear even with the tree-level Higgs potential thanks to the presence of a charge-neutral scalar state which transforms as a singlet under the Standard Model gauge group. Use of the NMSSM Higgs potential that includes both quantum and thermal corrections and the requirement of a viable (stable or long-lived) vacuum that breaks the electroweak symmetry, along with its compatibility with the latest Higgs data, lead to nontrivial constraints on the NMSSM parameter space.
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Beuria, J., Datta, A. Spontaneous breakdown of charge in the MSSM and in the NMSSM: possibilities and implications. J. High Energ. Phys. 2017, 42 (2017). https://doi.org/10.1007/JHEP11(2017)042
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DOI: https://doi.org/10.1007/JHEP11(2017)042