GUT origins of general electroweak multiplets and their oblique parameters

Liang Chen; Ta-Wei Chan; Thomas W. Kephart; Wai Yee Keung; Tzu-Chiang Yuan

doi:10.1016/j.nuclphysb.2023.116393

GUT origins of general electroweak multiplets and their oblique parameters

High Energy Physics - Phenomenology 2024-10-01 v2

Authors: Liang Chen , Ta-Wei Chan , Thomas W. Kephart , Wai Yee Keung , Tzu-Chiang Yuan

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Abstract

We survey the scalar electroweak multiplets that can originate from a grand unified theory (GUT) like $SU(5)$ , $SO(10)$ or $E_6$ . We compute the oblique parameters $S$ , $T$ and $U$ for a general scalar electroweak multiplet and then apply the results to the leptoquark, as well as the color sextet and octet cases, allowed by the GUT survey. Constraints from precision measurement data of the Standard Model $W$ boson mass and $\rho$ parameter to the mass splittings within each of these multiplets are presented. Extension to general vector electroweak multiplets is briefly discussed.

Keywords

grand unified theory electroweak multiplets oblique parameters leptoquark precision constraints

Cite

@article{arxiv.2306.10973,
  title  = {GUT origins of general electroweak multiplets and their oblique parameters},
  author = {Liang Chen and Ta-Wei Chan and Thomas W. Kephart and Wai Yee Keung and Tzu-Chiang Yuan},
  journal= {arXiv preprint arXiv:2306.10973},
  year   = {2024}
}

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GUT origins of general electroweak multiplets and their oblique parameters

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