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Particles and Fields

Standard Model

The Standard Model is a theory explains what the world is made of. It may seem simple but encapsulate all fundamental particles and their interactions between each other. There is three type of particle groups in Standard Model: quarks, leptons and bosons. Quarks and leptons are elementary particles construct the entire universe. We can classify these by generation, there is three generation. It has developed by thousands of physicists through 1900's with their eagerness to find out fundament and basis of matters. It has shown good agreement with experiment and gives us a proper explanation about physical phenomena. So it is generally accepted a as well tested theory. But still, there are some problems that model can't explain. Also, gravity, the missing part of Standard Model, is remaining to be unsolved. How to unify the gravity into the model is one of the biggest homework in particle physics.


Cms event.jpg

The Compact Muon Solenoid (CMS) is a general detector using the Large Hadron Collider (LHC). It has a broad physics programs ranging from studying the Standard Model to Search for extra dimensions and particles that could make up dark matter. The CMS detector is built around a huge solenoid magnet. The detector has the form of a cylindrical coil of superconducting cable (4 teslas, about 100,000 times the magnetic of the earth). Experiments at the LHC use detectors to analysis the myriad of particles produced by collisions in the accelerator. These experiments are run by the collaborations of scientists from institutes all over the world. The biggest advantage of collaborations between ATLAS and CMS is to use general-purpose detectors together and to effectively investigate the largest range of physics if available. Having two independently designed detectors is important for cross-confirmation of any new discoveries made. Both ALICE and LHCb have detectors specialised for focussing on specific phenomena. These four detectors sit underground in huge caverns on the LHC ring.

Particles and Fields Lab at University of Seoul (UOS) has been involved in the CMS experiment from 2007. UOS is Tier 3 Center and KCMS (CMS Korea) institutes centre.

Research Interests

Our main research areas are listed below.

Physics Analysis

  • Higgs to dimuon search
  • Top quark mass measurement
  • Top quark cross section measurement
  • Multi-jet correlations and colour coherence phenomena


  • Muon reconstruction in CMS
  • GEM software implementation in CMS


  • GEM Muon Detector development
  • Production of GEM foils


  • Maintaining CMS Tier 3 Center