Group theoretic evidence for SO(10) grand unification

Lykken, Joseph D.; Montroy, T.; Willenbrock, S.

doi:10.1016/S0370-2693(97)01416-0

Group theoretic evidence for SO(10) grand unification

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Phys.Lett.B

DOI:https://doi.org/10.1016/S0370-2693(97)01416-0· OSTI ID:1861379

Lykken, Joseph D. ^[1]; Montroy, T. ^[2]; ^[2]

Fermilab
Illinois U., Urbana

The hypercharges of the fermions are not uniquely determined in SO(10) grand unification, but rather depend upon which linear combination of the two U(1) subgroups of SO(10) > SU(3) X SU(2) X U(1) X U(1) remains unbroken. We show that, in general, a given hypercharge assignment can be obtained only with very high-dimensional Higgs representations. The observation that the standard model is obtained with low-dimensional Higgs representations can therefore be regarded as further evidence for SO(10) grand unification. This evidence is independent of the fact that SO(10) > SU(5).

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1861379

Report Number(s):: FERMILAB-PUB-97-341-T; arXiv:hep-ph/9710492; oai:inspirehep.net:450355

Journal Information:: Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 418

Country of Publication:: United States

Language:: English

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