Abstract
The potential for measuring the Standard Model (SM) Higgs boson decay into two muons at a 1.4 TeV CLIC e+e- collider, presented at ICHEP2014, is addressed in this paper. The study is performed in the full Geant4 detector simulations of CLIC_ILD, taking into consideration all the relevant physics and the beam-induced background processes, as well as the instrumentation of the very forward region to tag forward electrons. In this analysis we show that the branching ratio BR(H→μ+μ−) times the Higgs production cross-section can be measured with 38% statistical accuracy at s=1.4 TeV using an integrated luminosity of 1.5 ab-1. This study is part of an ongoing comprehensive Higgs physics benchmark study covering various Higgs production processes and decay modes, currently being carried out to estimate the full Higgs physics potential of CLIC.
Highlights
Measurements of the Higgs branching ratios and Higgs couplings provide a strong test of the Standard Model (SM) and possible new physics beyond
The possibility to perform precision Higgs physics at CLIC allows for a search for signs of physics beyond the SM
Measurements of Higgs boson couplings are of particular interest
Summary
Measurements of the Higgs branching ratios and Higgs couplings provide a strong test of the Standard Model (SM) and possible new physics beyond. Models that could possibly extend the SM Higgs sector (2HDM, Little Higgs models or Compositeness) will require Higgs couplings to electroweak bosons and Higgs-fermion Yukawa couplings (coupling-mass linearity) to deviate from the SM predictions. CLIC represents an excellent environment to study properties of the Higgs boson, including Higgs couplings, with a very high precision. Measurement of the rare ՜ ρρെdecay is challenging due to the very low branching ratio of order of 10-4 predicted by the SM. The measurement requires excellent muon identification efficiency and momentum resolution as well as comprehensive background suppression. In e+e- collisions at ξ ൌ1.4 TeV SM-like Higgs boson with a mass of 126 GeV is dominantly produced via W+W- fusion. Milutinovic-Dumbelovic / Nuclear and Particle Physics Proceedings 273–275 (2016) 2454–2456
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