[Triumf-seminars] TRIUMF Theory Seminar today at 13:00

[TRIUMF Seminars]

Date/Time: Tue 2015-01-27 at 13:00

Location:  Theory Room         

Speaker:   Samoil Bilenky (JINR (Dubna) and TRIUMF)

Title:     Neutrinos in the Standard Model and beyond

Abstract: After discovery of the Higgs boson at CERN  the Standard Model acquired a status of the full, correct theory of the elementary particles in the electroweak range (up to about 300 GeV).  What general conclusions can be inferred from the Standard Model? I suggest here that the Standard Model  teaches us that in the framework of such general principles as local gauge symmetry, unification of the weak and electromagnetic interactions and Brout-Englert-Higgs  spontaneous breaking of the electroweak symmetry the nature chooses the simplest possibilities. I apply this principle to neutrino. Massless  two-component left-handed  neutrinos play crucial role in the determination of the charged current structure of the Standard Model. The absence of the right-handed neutrino fields in the SM is simplest, most economical possibility. In such a scenario neutrinos with definite masses are Majorana particles. Their masses and mixing are determined by a beyond the Standard Model physics. The discovery of the neutrinoless double $\beta$-decay and  proof that neutrinos with definite masses are Majorana particles would be an important evidence in favor  of the considered scheme.



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