Peking University (PKU) joined the CMS Collaboration in 1996. The PKU group consists of five professors and researchers, some engineers and students. PKU’s hardware responsibility is with the RPC endcap (RE) of the CMS Muon sub-system. PKU carried out R&D for the RPCs and constructed one layer (RE1) of the initial RE system (including 3 layers of RPC endcap at the low-pseudorapidity region). They have collaborated with other countries (e.g. Italy, South Korea and Pakistan) to complete other parts of the reduced RE system by helping to provide read-out strips, structure mechanics and other components from China. Now, a majority of the PKU group has been working on the GEM R&D project for the Phase-2 Upgrade of CMS since the beginning of the project, including PCB, DAQ, cosmic-ray tests, beam tests, assembling, small-/big-size mass production, software, etc.

The PKU group has contributed to CMS physics since 2003, starting in the B-physics group with the study of the production mechanism and polarisation of J/ψ and Upsilon mesons in the high-pT region; lately, they have contributed to the measurement and search for the FCNC process B→ K^*μ⁺μ^-, etc.

In addition, the PKU group has been actively working in various other physics and trigger groups. They are also contributing to other physics topics, including a dark-matter study via invisible Higgs bosons, the high-mass Higgs boson searches (200–600 GeV or above), the new di-boson resonance searches with boosted jet, and the Standard Model multi-boson final states (including the world leading aQGC limit recently).

The PKU group has also participated in several CMS software projects as the EPR services, including the MET performance at Run 1, the JEC at HLT at Runs 1 and 2, the W-tagging, the GEM seeding for STA muons, and the CMS MC production.

About Peking University

From: China

CMS member since: 1996

Website: http://www.phy.pku.edu.cn/English.html