Particle physics has been a key study to reveal the hidden world of our universe. For last century, we have deeply understood the behavior of particles governed by the fundamental forces through the revolutionary discoveries in particle physics. However, there still exist various questions, such as baryson asymmetry of the universe, dark matter, dark energy, the existence of magnetic monopole, supersymmetric particles, Grand Unified Theory and so on. Even, researches related to the properties of higgs boson, the relation between higgs mechanism and the origin of mass are still ongoing.
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The members of our HEP lab. are working on the problems about Supersymmetry (SUSY) and the baryon asymmetry of the universe using top and anit-top quark events detected with the CMS (Compact Muon Solenoid) detector at CERN, which is the European Organization for Nuclear Research. CERN hosts the Large Hadron Collider which can produce proton-proton collision at 13 TeV of the center of mass energy. The collision energy will increase up to 14 TeV from 2017. From these proton-proton collisions, we try to collect top quark pair events to test CP violation in the top quark pair system, and to find events considered as supersymmetric particles.

Particle detectors are eyes of particle physicists. Using particle detectors, we detect fundamental particles produced from collisions and measure their four-vectors. Typically experimental particle physicists design and build particle detectors. Our lab. participates in RD52 (DREAM) collaboration, which is the generic calorimeter R&D project. Calorimeters have been the spirit of particle physics experiments since they measure energies of particles and identify particles. Especially, the main purpose of RD52 (DREAM) calorimeter is to achieve the theoretical limit of hadron energy resolution. This type of calorimeter will be a good candidate for future particle physics experiments.