Merkotan K. Application of multiparticle fields in the theory of electroweak interaction

The thesis is devoted to the Standard Model modification in order to avoid using non-gauge interactions, such as Higgs self-coupling, Yukawa coupling between fermions and the Higgs field, photon interactions with W– bosons. The Higgs boson is considered as a bound state of W± bosons and described within the multiparticle field method. At the same time, the spontaneous symmetry breaking mechanism is not postulated but it is obtained as a result of the solution for the model’ dynamic equations. Higgs self-coupling is also not postulated but it is an effect of the non-Abelian self-coupling of the weak interaction carriers. The Higgs boson is considered as a particle with the integer weak isospin, which agrees with the well-known experimental data on its decay modes. The new method of introducing the electromagnetic field is proposed. It is based on the requirement of Lagrangian’ local symmetry with respect to the replacement of the representation of the SU (2) group generators by an equivalent representation. It allowed explaining the well-known experimental fact of the difference between the electric charges for generations of quarks and leptons. The new method has been developed to determine the distribution of W– bosons produced in proton-proton collisions along the transverse momentum components to the collision beam line. It is shown that in different ranges of the transverse momentum the distribution is described by different formulas. This result has been obtained using the constructed model of the interaction between the multiparticle field of nucleons with W – bosons.