Prospects for $\gamma \gamma \to H$ and $\gamma \gamma \to W^{+}{W}^{-}$ measurements at the FCC-ee

Abstract

We study the possibilities for the measurement of two-photon production of the Higgs boson (in the $b\bar{b}$ decay channel), and of $W^{+}{W}^{-}$ pairs (decaying into four jets) in $e^{+}{e}^{-}$ collisions at the the Future Circular Collider (FCC-ee). The processes are simulated with the PYTHIA and MADGRAPH 5 Monte Carlo codes, using the effective photon approximation for the $e^{+}{e}^{-}$ photon fluxes, at center-of-mass energies $\sqrt{s}=$ 160 GeV and 240 GeV. The analyses include electron-positron tagging, realistic acceptance and reconstruction efficiencies for the final-state jets, and selection criteria to remove the backgrounds. Observation of both channels is achievable with the expected few ab${}^{-1}$ integrated luminosities at FCC-ee.

Comments: Proceedings of the conference PHOTON 2015: International Conference on the Structure and the Interactions of the Photon including the 21th International Workshop on Photon-Photon Collisions and the International Workshop on High Energy Photon Colliders, held at Budker Institute of Nuclear Physics (BINP), Siberian Branch of Russian Academy of Science, Novosibirsk, Russia, from 15 to 19 June, 2015