Beyond the Standard Model of Elementary Particle Physics by Yorikiyo Nagashima

By Yorikiyo Nagashima

A distinct and finished presentation on smooth particle physics which shops the heritage wisdom at the giant open questions past the normal version, because the life of the Higgs-boson, or the character of darkish topic and darkish power.

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By Yorikiyo Nagashima

A distinct and finished presentation on smooth particle physics which shops the heritage wisdom at the giant open questions past the normal version, because the life of the Higgs-boson, or the character of darkish topic and darkish power.

Show description

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Form factor of the bound states) for the high-energy part of the radiative contributions. However, realistic models have to reproduce the mass spectra of known fermions and phenomenologically established constraints, that is, suppression of FCNC. The mass generation mechanism of the ordinary fermions (denoted as f) is through Yukawa coupling in the SM, but the Higgs in TC is a composite of the technifermions. In order to generate the fermion mass, one has to have a new interaction that couples both to ordinary and TC fermions.

By gauging SU(3)V , both of them couple to the same gauge fields and thus are able to communicate with each other. The twofold SU(3) with 8 + 8 = 16 generators end up with 3 + 3 unbroken generators corresponding to the two SU(2) groups. This means that (8 − 3) × 2 = 10 generators are broken, thereby yielding 10 massless NGBs. After gauging SU(3)V , five of the NGBs are eaten up, giving mass to five gauge bosons but the other NGBs remain massless at this stage. The onset of the gauge interaction does not break the symmetry at the tree level, but breaks it when higher order terms, that is, radiative corrections, are taken into account.

We obtain two 8) This way of arranging the Higgs doublets may strike odd for those who are accustomed to the four-component Dirac spinor representation. c. 44) The reason why the Higgs fields are expressed like Eq. 43) is because, in the supersymmetric formalism, two-component left-handed Weyl spinors are the preferred bases to express fermion fields. Both quark and Higgs doublets are in the left-handed representation. 45) Thus, the position of the neutral component in the Higgs doublets should be reversed to produce the correct mass terms when they get the vacuum expectation value.

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