SU(5) grand unification on a domain-wall brane from an E{sub 6}-invariant action
- Physics Department, Ben-Gurion University, Beer-Sheva 84105 (Israel)
- School of Physics, Research Centre for High Energy Physics, The University of Melbourne, Victoria 3010 (Australia)
- Physics Department, Syracuse University, Syracuse, New York 13244-1130 (United States)
An SU(5) grand unification scheme for effective 3+1-dimensional fields dynamically localized on a domain-wall brane is constructed. This is achieved through the confluence of the clash-of-symmetries mechanism for symmetry breaking through domain-wall formation, and the Dvali-Shifman gauge-boson localization idea. It requires an E{sub 6} gauge-invariant action, yielding a domain-wall solution that has E{sub 6} broken to differently embedded SO(10) x U(1) subgroups in the two bulk regions on opposite sides of the wall. On the wall itself, the unbroken symmetry is the intersection of the two bulk subgroups, and contains SU(5). A 4+1-dimensional fermion family in the 27 of E{sub 6} gives rise to localized left-handed zero modes in the 5*+10+1+1 representation of SU(5). The remaining ten fermion components of the 27 are delocalized exotic states, not appearing in the effective 3+1-dimensional theory on the domain-wall brane. The scheme is compatible with the type-2 Randall-Sundrum mechanism for graviton localization; the single extra dimension is infinite.
- OSTI ID:
- 21250066
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 8; Other Information: DOI: 10.1103/PhysRevD.77.085031; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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