Abstract
In previous papers the permutation group S 4 has been suggested as an ordering scheme for quarks and leptons, and the appearance of this finite symmetry group was taken as indication for the existence of a discrete inner symmetry space underlying elementary particle interactions. Here it is pointed out that a more suitable choice than the tetrahedral group S 4 is the pyritohedral group A 4×Z 2 because its vibrational spectrum exhibits exactly the mass multiplet structure of the 3 fermion generations. Furthermore it is noted that the same structure can also be obtained from a primordial symmetry breaking S 4→A 4. Since A 4 is a chiral group, while S 4 is achiral, an argument can be given why the chirality of the inner pyritohedral symmetry leads to parity violation of the weak interactions.
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Notes
It seems then natural to assume that not only the internal symmetry is discrete but that physical space is a lattice, too. Although theories with a discrete inner symmetry over a continuous base manifold have been examined [10] they seem to me a bit artificial because they usually lead to domain walls and other discontinuities. Nevertheless, this point may be left open here, because for most arguments in this article it is not essential, whether physical space is discrete or continuous.
The nontrivial groups of order 24 are D 8×Z 3 and Dic 12×Z 2, S 3×K, Dic 24, SL(2,3), Q 8×Z 3, A 4×Z 2, S 4 and a semidirect product of D 8 and Z 3 (in the notation of Ref. [13]).
Note again that we are talking about Bloch waves in internal space while the Bloch waves in physical space reduce to ordinary free fermion fields in the limit of large distances (small spatial lattice constants).
An alternative to spontaneous symmetry breaking is an explicit breaking of symmetries, which could be induced for example by a pseudoscalar chiral interaction among the lattice atoms. Such an interaction is given e.g. by the scalar triple product
$$ H_{3}= f_3 \sum_{l,l',l'',s,s',s''} \vec{u} (l,s) \bigl[\vec{u}\bigl(l',s'\bigr) \times \vec{u} \bigl(l'',s''\bigr)\bigr] $$(29)of lattice vectors which is positive for even permutations and negative for odd ones. In the philosophy discussed in the main text, however, Eq. (29) is merely an effective interaction which could arise after the spontaneous symmetry breaking and may be used to describe chiral effects in the low energy regime.
More generally, in SO(d 1,d 2) the spinor dimensions viewed over complex space coincide with the case of the (d 1+d 2)-dimensional Euclidean space.
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Lampe, B. Chirality and Symmetry Breaking in a Discrete Internal Space. Int J Theor Phys 51, 3073–3100 (2012). https://doi.org/10.1007/s10773-012-1190-y
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DOI: https://doi.org/10.1007/s10773-012-1190-y
Keywords
- Quarks
- Leptons
- Tetrons
- Magnon
- Phonon
- Phase transition
- Nonabelian
- Generation symmetry
- Family symmetry
- Symmetric group
- Permutation group
- Mass matrix
- Chirality
- Parity violation
- Grand unification
- Higgs mechanism
- Spontaneous symmetry breaking
- Compactification
- Discrete symmetry
- Internal crystal
- Internal molecule
- Spin model
- Emergent gauge theory
- Heisenberg model