Domain walls and fermion scattering in grand unified models
- APC 11 place Marcelin Berthelot, 75005 Paris (France) and LPT, Universite de Paris-Sud, Bat. 210, 91405 Orsay Cedex (France)
Motivated by grand unification, we study the properties of domain walls formed in a model with SU(5)xZ{sub 2} symmetry which is spontaneously broken to SU(3)xSU(2)xU(1)/Z{sub 6}, and subsequently to SU(3)xU(1)/Z{sub 3}. Even after the first stage of symmetry breaking, the SU(3) symmetry is broken to SU(2)xU(1)/Z{sub 2} on the domain wall. In a certain range of parameters, flux tubes carrying color- and hyper-charge live on the domain wall and appear as 'boojums' when viewed from one side of the domain wall. Magnetic monopoles are also formed in the symmetry breaking and those carrying color and hyper-charge can be repelled from the wall due to the Meissner effect, or else their magnetic flux can penetrate the domain wall in quantized units. After the second stage of symmetry breaking, fermions can transmute when they scatter with the domain wall, providing a simpler version of fermion-monopole scattering: for example, neutrinos can scatter into d-quarks, leaving behind electric charge and color which is carried by gauge field excitations living on the domain wall.
- OSTI ID:
- 20774745
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 73, Issue 10; Other Information: DOI: 10.1103/PhysRevD.73.105021; (c) 2006 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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