5 papers
Quantum Numbers of AGUT Higgs Fields from the Quark-Lepton Spectrum
C. D. Froggatt, H. B. Nielsen, D. J. Smith
A series of Higgs field quantum numbers in the anti-grand unification model, based on the gauge group , is tested against the spectrum of quark and lepton mass…
Fermion masses, neutrino mixing and CP violation from the anti-grand unification model
C. D. Froggatt, M. Gibson, H. B. Nielsen +1
The fermion masses and mixing angles are fitted using only 3 free parameters in a non-supersymmetric extension of the Standard Model, with new approximately conserved chiral gauge…
Towards a Non-perturbative Formulation of IIB Superstrings by Matrix Models
A. Fayyazuddin, Y. Makeenko, P. Olesen +2
We address the problem of a non-perturbative formulation of superstring theory by means of the recently proposed matrix models. For the model by Ishibashi, Kawai, Kitazawa and Tsuc…
Fermion Masses and Anti-grand Unification
C. D. Froggatt, H. B. Nielsen, D. J. Smith
We present an extension of the Standard Model (SM) without supersymmetry, which we use to calculate order of magnitude values for the elements of the mass matrices in the SM. In ou…
Could there be a Fourth Generation of Quarks Without More Leptons?
C. D. Froggatt, H. B. Nielsen, D. J. Smith
We investigate the possibility of adding a fourth generation of quarks. We also extend the Standard Model gauge group by adding another SU(N) component. In order to cancel the cont…