Abstract The energy consumption of any the $${\mathrm{e}}^+{\mathrm{e}}^-$$ e + - Higgs factory projects that can credibly operate immediately after end LHC, namely three linear colliders (CLIC, operating at $$\sqrt{s}\,=\,380$$ <...
The full one-loop corrections, both the weak and QED to process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}Z\ensuremath{\phi}$ ($\ensuremath{\phi}={h}^{0},{H}^{0}$) in two-Higgs-doublet model (2HDM) at Higgs factories are presented. Up $O({\ensuremath{\alpha}}_{\mathrm{em}})$ level, virtual corrections evaluated by using feynarts/formcalc packages. real emission computed Feynman Diagra...
This paper outlines the RF design of the CLIC (Compact Linear Collider) 30 GHz main linac accelerating structure and gives the resulting longitudinal and transverse mode properties. The critical requirement for multibunch operation, that transverse wakefields be suppressed by two orders of magnitude within 0.7 ns (twenty fundamental mode cycles), has been demonstrated in a recent ASSET experime...
In order to achieve high luminosity, the Compact Linear Collider (CLIC) has to be operated in the highbeamstrahlung regime at centre-of-mass energies in the few TeV range. Beam-beam effects for this case are simulated. The dependence of luminosity, luminosity spectrum and background conditions on the different beam parameters is investigated. In particular the effect of beam size, waist shift a...
In this paper we address the potential of a 3 TeV center-of-mass energy Compact Linear Collider (CLIC) to measure branching fraction Higgs boson decay two photons, $\mathrm{BR}(H\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma})$. Since photons are massless, coupling is realized through higher order processes involving heavy particles either from Standard Model or beyond. Any devia...
The Compact Linear Collider (CLIC) [1] is a proposed multi-TeV linear electron-positron collider being designed by a world-wide collaboration. It is based on a novel twobeam acceleration scheme in which two beams (drive and main beam) are placed in parallel to each other and energy is transferred from the drive beam to the main one. Beam losses on either of them can have catastrophic consequenc...
