Fermion interactions, cosmological constant and spacetime dimensionality in an unified approach based on affine geometryстатья
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Дата последнего поиска статьи во внешних источниках: 20 сентября 2015 г.
Аннотация:One of the main features of unified models, based on affine geometries, is that all
possible interactions and fields naturally arise under the same standard. Here, we consider,
from the effective Lagrangian of the theory, the torsion induced 4-fermion interaction. In
particular, how this interaction affects the cosmological term, supposing that a condensation
occurs for quark fields during the quark-gluon/hadron phase transition in the early universe.
We explicitly show that there is no parity-violating pseudo-scalar density, dual to the curvature
tensor (Holst term) and the spinor-bilinear scalar density has no mixed couplings of
A-V form. On the other hand, the space-time dimensionality cannot be constrained from
multidimensional phenomenological models admitting torsion.