SAPPHiRE: a Small Gamma-Gamma Higgs Factory

Abstract

A new particle with mass ~ 125 GeV that resembles the Higgs boson has recently been discovered by ATLAS and CMS. We propose a low-energy gamma-gamma collider as a cost- and time-efficient option for a Higgs factory capable of studying this particle in detail. In the past, this option has been suggested as a possible application of the CLIC two-beam accelerator technology (the CLIC Higgs Experiment, CLICHE) or as an option for the ILC. Here we propose a design based on a pair of \sim 10 GeV recirculating Linacs (Small Accelerator for Photon-Photon Higgs production using Recirculating Electrons, SAPPHiRE) similar in design to those proposed for the LHeC. We present parameters for the e- beams and sketch a laser backscattering system capable of producing a gamma-gamma peak luminosity of 0.36 \times 10^34/cm2/s with E_CM (gamma-gamma) \sim 125 GeV. A gamma-gamma collider with such a luminosity could be used to measure accurately the mass, bbar, WW\ast, and gamma-gamma decays of the Higgs boson. We also comment on possible synergies with other projects such as LHeC, the ILC or CLIC, and on other physics prospects in gamma-gamma and e-gamma collisions.

13 pages, 7 eps figures, Submitted to the European Particle Physics Strategy Preparatory Group

References in corpus (3)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector

Cited by in corpus (7)

• Higgs Boson Studies at Future Particle Colliders
• Planning the Future of U.S. Particle Physics (Snowmass 2013): Chapter 3: Energy Frontier
• Photon collider Higgs factories
• CP-odd Higgs Boson Production in $e\gamma$ Collisions
• Comments on photon colliders for Snowmass 2013
• Fibre Lasers for Gamma Colliders
• The Undulator Radiation Collider: An Energy Efficient Design For A $\sqrt{s}=10^{15}$ GeV Collider