Lineshape of the Higgs boson in future lepton colliders

Abstract

The effect of the photon emission (bremsstrahlung) in the cross section of the process of direct production of the Higgs boson in the future high luminosity electron and muon colliders is calculated. It was found that cross section at the top of the Higgs boson resonance peak is reduced by factor 0.347 for the electron collider and 0.548 for the muon collider. Machine spread of the centre of the mass energy of 4.2MeV (equal to the Higgs width) would reduce peak cross section further, by factor 0.170 and 0.256 (QED and energy spread) for electron and muon beams respectively. Possible uncertainties in the resummed QED calculations are discussed. Numerical results for the lineshape cross section including QED and many values of the machine energy spread are provided.

18 pages, 7 figures; added new references

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• 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
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• Relativistic Voigt profile for unstable particles in high energy physics
• Physics case of FCC-ee
• ISR corrections to associated $HZ$ production at future Higgs factories
• True muonium resonant production at $e^{+}{e}^{-}$ colliders with standard crossing angle
• Final-state QED Multipole Radiation in Antenna Parton Showers
• Feasibility study of True Muonium discovery with CERN-SPS H4 positron beam
• Monochromatization interaction region optics design for direct s-channel Higgs production at FCC-ee
• Physics at a Higgs Factory
• Relaxing constraints on a broad dark photon
• CREDO project