TAILIEUCHUNG - Summary of physics doctoral thesis: Some new physical effects in the 3−2−3−1 and 3−3−3−1 models

Resolve the neutrino mass problem. Parameterize the parameters in the model 3−2−3−1 to seek for dark matter for each version of the model with q=0 and q=−1. Research for Z1 and Z01 at LEPII and LHC. Survey in detail the mass of gauge bosons, Higgs bosons, flavor-changing neutral current in the model 3−3−3−1 and calculate the branch ratio of the decay process mu - ey, u - 3e in the model. | MINISTRY OF EDUCATION VIETNAM ACADEMY AND TRAINING OF SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY - - - - - - - - - - - - - - - - NGUYEN THI NHUAN SOME NEW PHYSICAL EFFECTS IN THE 3 2 3 1 AND 3 3 3 1 MODELS Major Theoretical and Mathematical Physics Code 9 44 01 03 SUMMARY OF PHYSICS DOCTORAL THESIS Hanoi - 2019 INTRODUCTION 1. The urgency of the thesis The standard model SM of particle physics is based on two principal the- ories including electroweak theory with the SU 2 L U 1 Y gauge symmetry and QCD theory with SU 3 c gauge symmetry. The SM describes elementary particles which create matter and their interactions which make the entire universe. In the SM three interactions of particles are described successfully strong interactions electromagnetic interactions and weak interactions. Many predictions of the SM such as the existence of W Z boson quark c t neutral currents . have been verified with high fidelity by experiments. W Z found in 1981 with the masses measured as the model proposed. There are many ways to expand SM such as introducing the spectral particles extend gauge group etc. Therefore we would suggest two expansion models the 3 2 3 1 and the 3 3 3 1 models. The 3 2 3 1 model is based on the gauge group SU 3 C SU 2 L SU 3 R U 1 X . The 3 2 3 1 model solves the neu- trino masses problem provides naturally candidate for dark matter indicates the existence of FCNC at the approximate tree caused by the gauge bosons and Higgs explains why are there three fermion generations. The 3 3 3 1 model is based on the gauge group SU 3 C SU 3 L SU 3 R U 1 X . It unifies both the left-right and 3-3-1 symmetries so it inherits all the good fea- tures of the two models. Therefore the 3 3 3 1 model solves problems of fermion generation numbers neutrino masses problems dark matter problems parity symmetry in electroweak theory. In particular the model predicts lep- ton flavor violation of the charged lepton. Especially on 4 7 2012 a particel was .

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