Higgs physics with a $\gamma \gamma$ collider based on CLIC 1

D. Asner; H. Burkhardt; A. De Roeck; J. Ellis; J. Gronberg; S. Heinemeyer; M. Schmitt; D. Schulte; M. Velasco; F. Zimmermann

doi:doi:10.1140/epjc/s2002-01113-3

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2022 Impact factor 4.4

Particles and Fields

Eur. Phys. J. C 28, 27-44 (2003)
DOI: 10.1140/epjc/s2002-01113-3

Higgs physics with a $\gamma \gamma$ collider based on CLIC 1

D. Asner¹, H. Burkhardt², A. De Roeck², J. Ellis², J. Gronberg¹, S. Heinemeyer³, M. Schmitt⁴, D. Schulte², M. Velasco⁴ and F. Zimmermann²

¹ Lawrence Livermore National Laboratory, Livermore, California 94550, USA
² CERN, 1211 Geneva 23, Switzerland
³ Brookhaven National Laboratory, Upton, New York, USA
⁴ Northwestern University, Evanston, Illinois 60201, USA

(Received: 20 November 2001 / Published online: 24 March 2003 )

Abstract
We present the machine parameters and physics capabilities of the CLIC Higgs Experiment (CLICHE), a low-energy $\gamma \gamma$ collider based on CLIC 1, the demonstration project for the higher-energy two-beam accelerator CLIC. CLICHE is conceived as a factory capable of producing around 20,000 light Higgs bosons per year. We discuss the requirements for the CLIC 1 beams and a laser backscattering system capable of producing a $\gamma \gamma$ total (peak) luminosity of $2.0~(0.36) \times 10^{34}$ cm ^-2s ^-1 with $E_{CM}(\gamma \gamma) \sim 115$ GeV. We show how CLICHE could be used to measure accurately the mass, $\bar b b$ , WW and $\gamma \gamma$ decays of a light Higgs boson. We illustrate how these measurements may distinguish between the Standard Model Higgs boson and those in supersymmetric and more general two-Higgs-doublet models, complementing the measurements to be made with other accelerators. We also comment on other prospects in $\gamma \gamma$ and $e^- \gamma$ physics with CLICHE.