GUT origins of general electroweak multiplets and their oblique parameters

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

Nuclear Physics B (Jan 2024)

GUT origins of general electroweak multiplets and their oblique parameters

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

Affiliations

Liang Chen: School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; University of Chinese Academy of Sciences, 100190 Beijing, China
Ta-Wei Chan: Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
Thomas W. Kephart: Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA; Corresponding author.
Wai Yee Keung: Department of Physics, University of Illinois at Chicago, IL 60607, USA
Tzu-Chiang Yuan: Institute of Physics, Academia Sinica, Nangang, Taipei 11529, Taiwan

Journal volume & issue: Vol. 998
p. 116393

Abstract

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We survey the scalar electroweak multiplets that can originate from a grand unified theory (GUT) like SU(5), SO(10) or E6. 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 ρ parameter to the mass splittings within each of these multiplets are presented. Extension to general vector electroweak multiplets is briefly discussed.

Published in Nuclear Physics B

ISSN: 0550-3213 (Print); 1873-1562 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity
Website: http://www.journals.elsevier.com/nuclear-physics-b/

About the journal