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Standard Model Fermions and N=8 supergravity

MPS-Authors
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Meissner,  Krzysztof
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Nicolai,  Hermann
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1412.1715.pdf
(Preprint), 127KB

PhysRevD.91_065029.pdf
(Any fulltext), 111KB

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Citation

Meissner, K., & Nicolai, H. (2015). Standard Model Fermions and N=8 supergravity. Physical Review D, 91(6): 065029. doi:10.1103/PhysRevD.91.065029.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-97D0-7
Abstract
In a scheme originally proposed by M. Gell-Mann, and subsequently shown to be realized at the SU(3)xU(1) stationary point of maximal gauged SO(8) supergravity by N. Warner and one of the present authors, the 48 spin 1/2 fermions of the theory remaining after the removal of eight Goldstinos can be identified with the 48 quarks and leptons (including right-chiral neutrinos) of the Standard Model, provided one identifies the residual SU(3) with the diagonal subgroup of the color group SU(3)_c and a family symmetry SU(3)_f. However, there remained a systematic mismatch in the electric charges by a spurion charge of $\pm$1/6. We here identify the `missing' U(1) that rectifies this mismatch, and that takes a surprisingly simple, though unexpected form.