There are lots of new physics models which predict an extra neutral gauge boson, referred as Z -boson. In a certain class of these new physics models, the Z -boson has flavor-dependent couplings with the fermions in the Standard Model (SM). Based on a simple model in which couplings of the SM fermions in the third generation with the Z -boson are different from those of the corresponding fermio...

The prospective analyses for the search of the Standard Model (SM) Higgs boson decaying in to ZZ → 4 leptons (4e, 4μ or 2e2μ) or WW ∗ → lνlν ′ (l or l’ = e or μ) with the ATLAS and the CMS detectors at the CERN LHC pp collider are presented. Signal and background datasets obtained with a detailed Monte Carlo simulation of the detectors response are treated using a complete reconstruction chain....

In the context of a simple gauge-Higgs unification (GHU) scenario based on the gauge group SU(3)×U(1)′ in a 5-dimensional flat space-time, we investigate a possibility to reproduce the observed Higgs boson mass of around 125 GeV. We introduce bulk fermion multiplets with a bulk mass and a (half) periodic boundary condition. In our analysis, we adopt a low energy effective theoretical approach o...

One of the major goals of the LHC is to discover the Higgs boson, which is the only particle of the Standard Model (SM) that has not been seen yet at colliders. Even if we cannot predict its mass, SM precision electroweak fits seem to favour a low-mass Higgs,2 and LEP data excluded a mass below 114 GeV.3 That’s why we are going to focus on the search for a light Higgs boson at the LHC, assuming...

Methods for measuring the W -boson properties at hadron colliders are discussed. It is demonstrated that the ratio between the W and Z-boson observables can be reliably calculated using perturbative QCD, even when the individual W and Z-boson observables are not. Hence, by using a measured Zboson observable and the perturbative calculation of the ratio of the W over Z-boson observable, we can a...

These lectures focus on the structure of various Higgs boson theories. Topics in the first lectures include: mass generation in chiral theories, spontaneous symmetry breaking, neutrino masses, perturbative unitarity, vacuum stability, vacuum alignment, flavor changing neutral current solutions with multiple Higgs doublets, analysis of type I theory with Z2 symmetry, and rephasing symmetries. Af...

We present results on the strong and electroweak NLO corrections to the production of a Higgs boson plus two hard jets via weak interactions at the LHC. The calculation includes all weak-boson fusion and quark– antiquark annihilation diagrams as well as all related interferences. We discuss corrections of different origin (QCD corrections of vector-boson-fusion type and interferences, electrowe...