Domain wall generation by fermion self-interaction and light particles

Journal of High Energy Physics (Impact Factor: 6.22). 05/2003; DOI: 10.1088/1126-6708/2003/07/063
Source: arXiv

ABSTRACT A possible explanation for the appearance of light fermions and Higgs bosons on the four-dimensional domain wall is proposed. The mechanism of light particle trapping is accounted for by a strong self-interaction of five-dimensional pre-quarks. We obtain the low-energy effective action which exhibits the invariance under the so called \tau-symmetry. Then we find a set of vacuum solutions which break that symmetry and the five-dimensional translational invariance. One type of those vacuum solutions gives rise to the domain wall formation with consequent trapping of light massive fermions and Higgs-like bosons as well as massless sterile scalars, the so-called branons. The induced relations between low-energy couplings for Yukawa and scalar field interactions allow to make certain predictions for light particle masses and couplings themselves, which might provide a signature of the higher dimensional origin of particle physics at future experiments. The manifest translational symmetry breaking, eventually due to some gravitational and/or matter fields in five dimensions, is effectively realized with the help of background scalar defects. As a result the branons acquire masses, whereas the ratio of Higgs and fermion (presumably top-quark) masses can be reduced towards the values compatible with the present-day phenomenology. Since the branons do not couple to fermions and the Higgs bosons do not decay into branons, the latter ones are essentially sterile and stable, what makes them the natural candidates for the dark matter in the Universe. Comment: 34 pages, 2 figures, JHEP style,few important refs. added

  • [Show abstract] [Hide abstract]
    ABSTRACT: The model of a domain wall (“thick brane”) in a noncompact five-dimensional space-time with asymmetric geometries of AdS type aside the brane is proposed. This model is generated by fermion self-interaction in the presence of gravity. Asymmetric geometries in the bulk are provided by a space defect in the scalar field potential and the related defect of cosmological constant. The possibility of localization of scalar modes on such “thick branes” is studied. Bibliography: 21 titles.
    Journal of Mathematical Sciences 01/2010; 168(6):772-780.
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: It is well known that the $U(1)$ gauge vector field, with the standard five-dimensional (5D) action, cannot be localized on Randall-Sundrum-like braneworlds with an infinite extra dimension. In this paper, we propose a modified 5D action to localize $U(1)$ gauge vector field on flat branes with an infinite or finite extra dimension . The localization mechanism is realized by adding a dynamical mass term into the standard 5D action of the vector field, which is proportional to the 5D scalar curvature. It is shown that the vector zero mode is localizable if the 5D spacetime is (asymptotic) $AdS_{5}$. Moreover, the massive tachyonic modes can be excluded.
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We briefly review the mechanism of fermion localization on a domain wall (“thick brane”) generated by a topologically nontrivial vacuum configuration of scalar fields. We propose an extension of the scalar field coupling to fermions that endows the fermions with an axial mass. In the case of several flavors and fermion generations, this extension can lead to the appearance of the Standard Model Cabibbo-Kobayashi-Maskawa matrix. We also consider a model with two scalar doublets that ensures an additional mechanism of CP-parity violation.
    Theoretical and Mathematical Physics 06/2013; 175(3). · 0.70 Impact Factor

Full-text (2 Sources)

Available from
May 31, 2014