tailieunhanh - Summary of the PhD thesis: Construction and investigation of a neutrino mass model with A4 flavour symmetry by pertubation method

The thesis is devoted to constructing and evaluating versions of the SM extended with an A4 symmetry to explain some of the problems of neutrino physics. Within these extended models, the results on neutrino masses and mixing, derived by the perturbation method, are very closed to the global fit. In two models, a relation between the Dirac CPV phase and the mixing angles is established. In particular, the models predict Dirac CPV phase δCP and effective mass of neutrinoless double beta decay jhmeeij in good agreement with the current experimental data. | MINISTRY OF EDUCATION VIETNAM ACADEMY AND TRAINING OF SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY . . PHI QUANG VAN CONSTRUCTION AND INVESTIGATION OF A NEUTRINO MASS MODEL WITH A4 FLAVOUR SYMMETRY BY PERTUBATION METHOD Speciality Theoretical and mathematical physics Code 62 44 01 03 SUMMARY OF THE PHD THESIS Hanoi 2017 This thesis was compled at the Graduate University Science and Technology Viet Nam Academy of Science and Technology. Supervisors Assoc. Prof. Dr. Nguyen Anh Ky Institute of Physics Viet Nam Academy of S cience and Technology. Referee 1 Prof. Dr. Dang Van Soa Referee 2 Assoc. Prof. Dr. Nguyen Ai Viet Referee 3 Dr. Tran Minh Hieu This dissertation will be defended in front of the evaluating assembly at academy level Place of defending meeting room Graduate University Science and Technology Viet Nam Academy of Science and Technology. This thesis can be studied at - The Vietnam National Library - Library of the National Academy of Public Administration Introduction Motivation of thesis topic Neutrino masses and oscillations are always a challenge in elementary particle physics. We have seen in the standard model SM that neutrinos do not have mass but the experiment has shown that neutrinos have mass. The problem of neutrino masses and mixings is among the problems beyond the SM. This problem is important for not only particle physics but also nuclear physics astrophysics and cosmology therefore it has attracted much interest. At present there are many standard model extensions to studying neutrino masses and oscillations the supersymmetry model the grand unified theory the left-right symmetry model the 3-3-1 model the mirror symmetry model Zee model Zee-Babu model the flavour symmetry model etc. One of the standard model extentions to explain neutrino mass is to add a flavor symmetry to the SM symmetry such as SU 3 C SU 2 L U 1 Y GF in which GF is a flavour symmetry group for example S3 S4 A4 A5 T 7 27 1 . A popular flavour .