Theoretical Precision Study On The Production Of The Heavy Gauge Bosons At The LHC

The Standard Model is a rather unsatisfying end to a quest for understanding the fundamental nature of everything. Despite its wide success in many areas, it doesn’ t work in all cases, especially the hierarchy problem. Due to solving the hierarchy problem, the Littlest Higgs Model with T-parity have attracted much attention. This new model has predicted some new particles. The Large Hadron Collider at the CERN will provide a nice experimental platform for probing new physics.We investigate the effects of the Littlest Higgs Model with T-parity up to the next-to-leading order (NLO) QCD on the WH±ZHI/WH+W-H productions at the CERN Large Hadron Collider, and discuss the theoretical dependence of the cross section on the fac-torization/renormalization scale and global symmetry-breaking scale f. For the WH±ZH production, we show the numerical results with two event-selection schemes in the NLO QCD corrections and point out that the adopting the PROSPINO subtraction strategy can keep the convergence of the perturbative series. For the WH+WH-production, we just apply the PROSPINO subtraction strategy. We also discuss the kinematic distributions of final decay products and the missing transverse-momentum of the WH±ZH/W+HWH-productions in the leading-order and up to NLO QCD corrections. Our numerical re-sults show that the absolute relative correction are considerable. This effect can pro-vide excellent theorectial foundation for the Littlest Higgs Model with T-parity particles hunting. The innovations in this thesis are listed below:●In this thesis, we calculated the productions of heavy gauge boson of WH±ZH/WH+WH-in the Littlest Higgs Model with T-parity at the Large Hadron Collider for the first time. The accurate results of these processes are presented. Our calculation would be helpful for the Large Hadron Collider experiments to detect new particles and look for physics beyond the Standard Model.●We present firstly the analytical decay widths of T-odd quarks in the Littlest Higgs Model with T-parity up to QCD NLO for precision study on the processess men-tioned above to solve the new particles resonance problem.