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Future High Energy Circular Colliders  

The Standard Model (SM) of particle physics can describe the strong, weak and electromagnetic interactions under the framework of quantum gauge field theory. The theoretical predictions of SM are in excellent agreement with the past experimental measurements. Especially the 2013 Nobel Prize in physics was awarded to F. Englert and P. Higgs “for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of subatomic particles, and which recently was confirmed through the discovery of the predicted fundamental particle, by the ATLAS and CMS experiments at CERN's Large Hadron Collider”.

After the discovery of the Higgs particle, it is natural to measure its properties as precise as possible, including mass, spin, CP nature, couplings, and etc., at the current running Large Hadron Collider (LHC) and future electron positron colliders, e.g. the International Linear Collider (ILC). The low Higgs mass of ~125 GeV makes possible a Circular Electron Positron Collider (CEPC) as a Higgs Factory, which has the advantage of higher luminosity to cost ratio and the potential to be upgraded to a proton-proton collider to reach unprecedented high energy and discover New Physics.

The CEPC input for the European Strategy


Accelerator Addendum

Physics and Detector

Physics and Detector Addendum



CEPC Site Selection

Qinhuang Island, Hebei, China

Huzhou, Zhejiang, China

Changsha, Hunan, China

Panel Discussion on Fundamental Physics

Nine world leading physicists had face-to-face discussions at Tsinghua University, Beijing on Feb 23,sharing with the public their opinions on new physics opportunities after the discovery of Higgs.

Chaired by Shing-Tung Yau, a Fields medalist, the panel discussions involved a group of noted scientists, Nima Arkani-Hamed, David Gross, Gerard 't Hooft, Joseph Incandela, Luciano Maiani, Hitoshi Murayama, Yifang Wang and Edward Witten.

Proposed by the Chinese high energy physics community in 2012, the circular electron positron collider (CEPC) has got warm responses from the international community. This machine could be later upgraded to a high energy proton-proton collider with physics potential far beyond the Higgs factory. 

From February 24 to 25, a two-day workshop focusing on the physics case for future circular colliders, as well as discussions on how to synchronize the domestic theoretical particle physics efforts with the planning and designing of future circular machines was held at the Institute of High Energy Physics.
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