| Techniques of collider physics are systematically reviewed in this thesis and hard pro-cess simulation at the LHC is analyzed in detail. As an application, we study the LHC signatures of new neutral gauge boson Z1 which is predicted by Higgsless models. Z1 can decay to W pair or tt, which provide two different channels to observe Z1. We investigated both two channels and choose two specific interaction chain pp→jj+e±+e±+ET and PP→jjjj+e±+e±+ET for each channel. Both channels are promising to discover Hig-gsless Z1 at the LHC. In both cases, we propose to focus on the multijet+e±e±+ET final states. We find that it is possible to observe the Z1 resonance upto 650 GeV at a 5σlevel with an integrated luminosity of 100 fb-1 for a dominant WW channel, and 560 GeV for a dominant of tt channel. The unparticle phenomenology on the Z pole is also studied in this thesis, with the hope to solve the 3a anomaly of A(?) by unparticle sector. Unfortunately, for most part of the parameter space except certain particular regions, the anomaly could not be explained away plausibly, when constraints from other LEP observables are taken into account.
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