In line with the recent proposal for the update of the European Strategy of Particle Physics, we propose to launch a design study of the performance and feasibility of high-energy, high luminosity circular e+e- colliders. The main physics objective is the precise investigation of the properties of the Standard Model Higgs boson candidate with a mass of 126 GeV/c2 recently discovered at the LHC. This study best takes place at the maximum of the ZH production cross section, i.e., at a centre-of-mass energy around 240 GeV.
Equally important, the very high luminosities available would provide, within a few years, unprecedented statistics at the Z peak (~1012 Z decays), at the W pair threshold (>107W pairs), and at the top pair threshold, for outstanding precision measurements of quantities sensitive to new physics through electroweak radiative corrections, thereby testing the closure of the Standard Model.
The focus of the proposed design study is “TLEP”, a circular e+e- collider hosted in a new tunnel of 80 km circumference, with the long-term perspective of hosting a 80-100 TeV hadron collider (SHE-LHC). The centre-of-mass energy reach of TLEP is above the ttbar threshold (Ecm > 350 GeV) and the luminosity at the ZH cross-section maximum amounts to 5.1034 cm-2s-1 in each of the interaction regions, leading to two million Higgs bosons produced in five years for four experiments. Scaling to other tunnel circumferences will also be considered.
read more on the TLEP study web site
Equally important, the very high luminosities available would provide, within a few years, unprecedented statistics at the Z peak (~1012 Z decays), at the W pair threshold (>107W pairs), and at the top pair threshold, for outstanding precision measurements of quantities sensitive to new physics through electroweak radiative corrections, thereby testing the closure of the Standard Model.
The focus of the proposed design study is “TLEP”, a circular e+e- collider hosted in a new tunnel of 80 km circumference, with the long-term perspective of hosting a 80-100 TeV hadron collider (SHE-LHC). The centre-of-mass energy reach of TLEP is above the ttbar threshold (Ecm > 350 GeV) and the luminosity at the ZH cross-section maximum amounts to 5.1034 cm-2s-1 in each of the interaction regions, leading to two million Higgs bosons produced in five years for four experiments. Scaling to other tunnel circumferences will also be considered.
read more on the TLEP study web site
