UL(2)⨂UR(2)U_L(2)\bigotimes U_R(2) Model of Electro-Weak Interaction

The $U_L(2)\bigotimes U_R(2)$ gauge model for the unified theory of the electromagnetic and weak interactions which is free from a prior self-interaction scalar field, is developed. Due to breaking the initial symmetry the $SU_L(2)\bigotimes U_R(1)$ Lagrangian is derived. The obtained $SU_L(2)\bigotimes U_R(1)$ Lagrangian contains the whole of terms corresponding both to free boson and fermion fields and to interaction between them, as it takes place in the Standard Model (SM) . We show that all boson fields, including the Higgs one, directly arise due to breaking the initial symmetry, and are generated by the initial gauge fields in contrary to the Standard Model consideration. The Higgs fields are studied in detail. A broad spectrum of states of the Higgs bosons is found. The masses of the Higgs particle in such states are calculated

Suppression of soft nuclear bremsstrahlung in proton-nucleus collisions

Photon energy spectra up to the kinematic limit have been measured in 190 MeV proton reactions with light and heavy nuclei to investigate the influence of the multiple-scattering process on the photon production. Relative to the predictions of models based on a quasi-free production mechanism a strong suppression of bremsstrahlung is observed in the low-energy region of the photon spectrum. We attribute this effect to the interference of photon amplitudes due to multiple scattering of nucleons in the nuclear medium.Comment: 12 pages, 3 figures, submitted to Phys. Rev. Let

Proceedings of the 38th International Symposium on Multiparticle Dynamics (ISMD08)

Proceedings of ISMD08Comment: Edited by: J. Bartels, K. Borras, G. Gustafson, H. Jung, K. Kutak, S. Levonian, and J. Mnic