LHeC: The Large Hadron-Electron Collider

John Dainton
2007 15th International Workshop on Deep-Inelastic Scattering and Related Subjects DIS 2007   unpublished
The possibility of an upgrade, LHeC, to the LHC at CERN is presented in which electron(positron)-proton (ep) physics at the TeV energy scale is realized by adding a 70 GeV electron(positron) storage ring to the LHC tunnel. An ep luminosity of 10 33 cm -2 s -1 which is possible when the stored beam is in collision with the 7 TeV LHC proton beam, is demonstrated. The physics horizon is outlined. Introduction 2007: a vintage year for Physics Next year, 2007, looks to have every chance of being a
more » ... chance of being a vintage year for physics. In July, the world's only high energy particle collider, HERA will complete data-taking. HERA is a unique and remarkable scientific tool. Electron(positron)-proton (ep) physics combines the features characteristic of discovery with the features characteristic of precision. This is because we understand lepton and vector boson physics, and because we have an established and quantitative phenomenology of the deep structure of the proton. As HERA reaches its limax, towards the end of vintage year 2007, the first TeV CM energy, proton-proton, collisions will be achieved. The Lepton-Hadron TeV Dimension The LHC will be a unique source of hadronic matter at immense energy (7 TeV). All possibilities for discovery and understanding with such beams must be explored. With this in mind, the scope and the importance of physics at HERA, which probes so much at its energy scale of 0.3 TeV, therefore points to a new round of lepton-hadron physics at the new energy scale of the LHC. It obviously requires an electron (positron) beam of the highest possible energy * The work reported here was completed in collaboration with Max Klein (DESY Zeuthen), Paul Newman (University of Birmingham), Emmanuelle Perez (CEN Saclay), and Ferdinand Willeke (DESY Hamburg). It appears in preprint in
doi:10.3360/dis.2007.225 fatcat:prqrgjxi5ngsnpxemj7q25hi4q