Potential precision of a direct measurement of the Higgs boson total width at a muon colliderr

Abstract

In the light of the discovery of a 126 GeV Standard-Model-like Higgs boson at the LHC, we evaluate the achievable accuracies for direct measurements of the width, mass, and the s-channel resonant production cross section of the Higgs boson at a proposed muon collider. We find that with a beam energy resolution of R=0.01% (0.003%) and integrated luminosity of 0.5 fb^{-1} (1 fb^{-1}), a muon collider would enable us to determine the Standard-Model-like Higgs width to +/- 0.35 MeV (+/- 0.15 MeV) by combining two complementary channels of the WW^* and b\bar b final states. A non-Standard-Model Higgs with a broader width is also studied. The unparalleled accuracy potentially attainable at a muon collider would test the Higgs interactions to a high precision.

arXiv comment7 pages, 5 figures. Version appeared on Physical Review D

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• Scrutinizing h(125) in Two Higgs Doublet Models at the LHC, ILC, and Muon Collider
• Probing electroweak phase transition with multi-TeV muon colliders and gravitational waves
• ISR effects for resonant Higgs production at future lepton colliders
• High Precision Higgs from High Energy Muon Colliders
• Radiative Return for Heavy Higgs Boson at a Muon Collider
• Testing leptogenesis at the LHC and future muon colliders: a $Z^{\prime }$ scenario
• Potential Precision on Higgs Couplings and Total Width at the ILC
• Report of the ICFA Beam Dynamics Workshop 'Accelerators for a Higgs Factory: Linear vs. Circular' (HF2012)
• Physics potential of a muon-proton collider
• Mono-chromatic single photon events at the muon collider
• The Muon Collider as a $H/A$ factory
• Improving Higgs coupling measurements through ZZ Fusion at the ILC
• Searches for new interactions within the SMEFT framework at present and future colliders