The Circular Electron Positron Collider Project - Physics and detector
A future electron-positron collider, operating as “Higgs factory”, has been recognised as high priority by the 2020 update of the European Strategy for Particle Physics (ESPPU), together with a future hadron collider at higher energy frontier. It represents an important experimental pursuit of fundamental physics. Several electron-positron colliders have been proposed internationally, including linear colliders ILC/CLIC and circular colliders FCC-ee and CEPC. These facilities have a significant overlap in scientific potential, and share a large fraction of accelerator and detector R&D effort.
The CEPC, with a main accelerator ring of 100 km in circumference, is a large international scientific project proposed by the Chinese HEP community soon after the Higgs boson discovery in 2012. It is designed to operate at three centre-of-mass energies, including 91.2 GeV as a Z factory, at 160 GeV around the W pair production threshold, and 240 GeV as a Higgs factory. In its planned ten-year operation with two detectors, the CEPC will deliver integrated luminosities of about 16, 2.6, and 5.6 ab-1 for the Z, W and Higgs operation, respectively, producing close to one trillion Z bosons, 20 million W bosons and over one million Higgs bosons. This will allow for detailed studies of the Higgs boson, connected with the fundamental fabrics of the universe, with an unprecedented precision. Its clean collision environments provide access to many new exciting experimental signatures that are otherwise difficult to trigger on or reconstruct at hadron colliders. The decays of the vastly produced Z, W, and Higgs bosons also offer excellent opportunities for flavour physics, tau-lepton physics, and QCD physics.
This talk will summarise the latest progress of the CEPC project, focusing on physics potential, detector R&D, international collaborations, and opportunities for the UK involvement.
The experimental particle physics seminar series invites speakers from all over Europe to discuss the latest developments at the LHC, accelerator and non-accelerator based neutrino physics, hardware R&D and astroparticle physics. .