A ''master sign postulate'' from the vanishing of the vacuum angle in QCD, its first applications and news hints about gravity

par Alexis Zaganidis

jeudi 2 juil. 2015, 10:30 → 11:30 Europe/Paris

Auditorium (Annecy-le-Vieux)

A ''master sign postulate'' is introduced in order to solve the strong CP problem. In other words, the sign of Lagrangian terms are nonphysical if and only if they do not break SM gauge symmetries and SM postulates. More formally, the ''master sign postulate'' can be translated into a ''$Z_2$ symmetry''. We apply ''the master sign postulate'' in the quark sector (prediction of the CP violating phase), in the neutrinos sector (predication of the hierarchy, the neutrinos masses, the CP violating phases and $\theta_{23}$), in the Higgs potential sector and about the universe flatness. The ''master sign postulate'' allows to consider a global number of generations for all fields. Three generations is the minimal number which breaks every possible non-gauge symmetries (breaking of CPT is not possible) for every sign-allowed SM Lagrangian.