Doctor of Science, Nagoya University, 2014
Room No.323 in the Building No.3 of Graduate Scool for Science and Technology
Phone : 6667
I have been a member of the ATLAS collaboration at the CERN LHC. The ATLAS experiment explore the fundamental particles and its interactions using the world largest and most energetic accelerator "LHC". My primary interest is the top quark pair production as a probe of pQCD. The top quark is the heaviest elementary particle in the Standard Model, and thus quite crucial to understand the pQCD theory and the parton distribution functions of the protons. Unknown new particles can decay into the top quarks, so it is also important to explore such new particles. In addition to above, top quark event are always unavoidable background in the several searches for new physics, therefore the detail understanding of the kinematic distribution of the top quark is crucial. I have been verifying the validity of the Monte Carlo predictions and pQCD calculations, by measuring the differential cross-section of the top quark pairs. I keep these studies and will contribute the ATLAS operation at the pp collisions with new energy.