31,605 research outputs found
A precise definition of the Standard Model
We declare that we are living in the quantum 4-dimensional Minkowski
space-time with the force-fields gauge-group structure built-in from the very beginning. From this overall
background, we see the lepton world, which has the symmetry characterized by
- the lepton world is also called "the
atomic world". From the overall background, we also see the quark world, which
experiences the well-known symmetry, i.e., . The quark world is also called "the nuclear world".
The cosmic microwave background (CMB) in our Universe provides
the evidence of that "the force-fields gauge-group structure was built-in from
the very beginning". The CMB is almost uniform, to the level of one part in
, reflecting the massless of the photons.
The lepton world is dimensionless in the 4-dimensional Minkowski space-time.
That is, all couplings are dimensionless. The quark world is also dimensionless
in the 4-dimensional Minkowski space-time. Apart from the "ignition" term, the
gauge and Higgs sector, i.e., the overall background, is also dimensionless.
Thus, apart the "ignition" term, our world as a whole is dimensionless in the
4-dimensional Minkowski space-time - that is, it is the characteristic of the
quantum 4-dimensional Minkowski space-time.Comment: 1 figure. arXiv admin note: substantial text overlap with
arXiv:1301.646
- β¦