Tagging jets originated from bottom quarks (b-tagging) plays an important role in various physics programs in ATLAS. It is important to understand and calibrate the performance of the b-tagging. In addition, b-tagging can be sensitive to long-lived particles whose lifetime is within a certain region. I have been working on exotic resonance searches with b-tagging, b-tagging calibrations and long-lived particle reinterpretation with b-tagging involved. In this seminar I will share the lessons and experiences I've obtained and discuss several topics of interest.

After obtaining my bachelor degree at University of Electronic Science and Technology of China in 2011, I went to The Ohio State University (US) for graduate school, during which I joined the Compact Muon Solenoid (CMS) collaboration and worked on the Cathode Strip Chamber (CSC) and exotic long-lived particle searches. I earned my Ph.D degree in 2016 and continued my career in collider physics as a postdoctoral research in Argonne National Laboratory (US), working with the ATLAS group. I have been based at CERN (Switzerland) since 2016 and leading several physics analyses and flavor tagging efforts.