1.5 Conclusions and Outlook
The three sectors of the standard model—strong, electroweak and Higgs—represent
a tribute to the concept that symmetry, and symmetry breaking, is the guiding
principle for particles and interactions.
We have emphasized the role of different definite patterns for the breaking of
symmetries, like
– Mass terms are incompatible with both gauge and chirality symmetries.
– Quantum loop anomalies break conformal symmetry for vector theories and
gauge symmetry for chiral field theories.
– The particle content of the theory controls the breaking of discrete symmetries CP
and T.
– A gauge asymmetric vacuum leads to spontaneous symmetry breaking with
hidden gauge symmetry and explaining the origin of mass for elementary
particles.
What next? There are theoretical and observational reasons for searching
Beyond-Standard-Model Physics at LHC experiments and in other facilities. I list
some of them:
– Why the quantization of electric charge, magnetic monopoles?
Fig. 1.8 Production and Decay of the Higgs boson observed in the ATLAS and CMS experiments
14
J. Bernabeu