2019 Spring Physics Colloquium 

강연일자: 2019. 06. 04. 화. 오후 5시

장소: 아산이학관 433호

강연자: 유재혁 (고려대)

강연주제: New physics search at the LHC: Road less traveled

        Searches for physics beyond the standard model (SM) is motivated by several considerations. While the SM has been successful in describing a vast range of phenomena, its inability to address issues such as explaining the observed mass of the Higgs boson in the presence of quantum corrections (the hierarchy problem), and astrophysical evidence for dark matter makes it an incomplete description of fundamental particles and their interactions. Supersymmetry (SUSY), an extension of the SM, provides possible solutions to these problems. Recent searches at the LHC have set a stringent limit on R-parity conserving (RPC) SUSY production. Due to this, there is mounting tension in the ability of RPC SUSY models to explain the hierarchy problem with little fine tuning. There is no fundamental reason for R-parity conservation, and R-parity violating (RPV) SUSY can ease the tension between natural solutions to the hierarchy problem and current experimental limits. In this talk, I will present an effort to search for RPV SUSY at CMS as well as an introduction to experimental particle physics at the LHC. LHC has not found an evidence for new physics, not only for SUSY but other models in general. This might just mean that new physics is hiding where we did not pay enough attention. The milliQan experiment searches for milli-charged particles produced at the LHC, which is not feasible with CMS or ATLAS detectors. I will discuss the idea and the progress of the experiment in this talk.