H. B. Nielsen

Top Yukawa New Strong Sector, Higgs Decay and Production

We call attention to the fact that the top-Yukawa-coupling gt being of order unity a priori opens up the possibility for there existing a new sector of strongly i nteracting particles. That is to say that you may have phenomena such as bound states among the particl es involved in these relatively strong interacions caused by the Yukawa coupling gt , much analogous to QCD. That is to say: top quarks and Higgses should form possible resonances and s tro g binding. Really one should rather ask for whether g2 t /2/(2π) is large or small compared to unity, and thus it seems at first n ot of order unity, but if we correct by a factor 12 for considerin g a bound state of 12 constituents, we get a number of order unity, and a strong sector is expected ! After the Korfu meeting a new diphoton resonace of mass 750 GeV were found in ATLAS and CMS, which could potentially be a bound state of 6 top + 6 anti top binding strongly, precisely b cause the top-Yukawa coupling is “large”.

Fermion and Higgs masses and the AGUT model

We present two rather differently based predictions for the quark and lepton spectrum: One provides a rather successful fit to the mass suppressions—the well known fermion mass hierarchy—interpreted as due to most mass terms needing to violate approximately conserved quantum numbers corresponding to the AGUT group SMG3×U(1)f. This is actually, under certain conditions, the maximal group transforming the known 45 Weyl components of the quark and leptons into each other. From the fit to the fermion spectrum, we get a picture of the series of Higgs fields causing the breakdown (presumably at the Planck scale) of this AGUT to the Standard Model and, thus, providing the small masses of all quarks and leptons except for the top quark. We separately predict the top quark mass to be 173±5 GeV and the Higgs mass to be 135±9 GeV, from the assumption that there be two degenerate minima in the effective potential for the Weinberg Salam Higgs field with the second one at the Planck field strength.