2014
DOI: 10.1103/physrevd.90.055029
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Two viable large scalar multiplet models with aZ2symmetry

Abstract: We study models in which the Higgs sector is extended by a single scalar electroweak multiplet Z with isospin T = 5/2 (sextet) or 7/2 (octet) and the same hypercharge as the Standard Model Higgs doublet, in which Z is odd under a global Z2 symmetry. This Z2 symmetry keeps the lightest (neutral) member of Z stable and has interesting implications for phenomenology. We determine the constraints on these models from precision electroweak measurements and Higgs boson decays to two photons. We compute the thermal r… Show more

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Cited by 12 publications
(24 citation statements)
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“…, (5.2) so we see that there are 11 independent operators at the dimension-4 level. 3 As a side note, the field and group representation content for this example is simple enough that the closed form for the unrefined Hilbert series can be calculated. The result is…”
Section: Hilbert Series For Bsmmentioning
confidence: 97%
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“…, (5.2) so we see that there are 11 independent operators at the dimension-4 level. 3 As a side note, the field and group representation content for this example is simple enough that the closed form for the unrefined Hilbert series can be calculated. The result is…”
Section: Hilbert Series For Bsmmentioning
confidence: 97%
“…One common way to augment the complexity of a model is to simply add particles transforming under higher-dimensional group representations. For some representative examples using sizable group representations in phenomenological settings, see [1][2][3][4][5] and references therein. In addition to complex model building, another line of attack in the search for new physics takes a general bottom-up approach -parameterizing BSM effects through higher dimensional operators formed from SM fields.…”
Section: Introductionmentioning
confidence: 99%
“…The SM is also a non-abelian gauge theory, meaning that the Lagrangian which describes the interactions of the subatomic particles is locally gauge invariant 6 under a certain symmetry group, SU(3) c × SU(2) L × U (1) Y [45,46]. It is non-abelian because the generators of the SU (3) and SU (2) sectors are non-commutative. The 5 The SM does not include gravity.…”
Section: The Gauge Sectormentioning
confidence: 99%
“…or more electroweak scalar multiplets of size n ≥ 3. In particular, it will consider two classes of models with large inert multiplets of size n ≥ 5 [2,3], as well as the Georgi-Machacek model (GM), which includes scalar triplets [30,70]. We will focus on the ability of these models to provide explanations and benchmarks for dark matter, exotic scalars, and altered Higgs couplings.…”
Section: Bsm Scalar Extensionsmentioning
confidence: 99%
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