Quarks and Leptons From Orbifolded Superstring

Using the successful standard model of particle physics but without clear guidance beyond it, it is a di?cult task to write a physics book beyond the standard model from a phenomenological point of view. At present, there is no major convincing inner space related experimental evidence against the standard model. The neutrino oscillation phenomena can be considered part of it by including a singlet ?eld in the spectrum. Only the outer space - servations on matter asymmetry, dark matter, and...