Measurement of the Higgs boson mass and $e^{+}{e}^{-}\to ZH$ cross section using $Z\to {\mu }^{+}{\mu }^{-}$ and $Z\to e^{+}{e}^{-}$ at the ILC

Abstract

This paper presents a full simulation study of the measurement of the production cross section (${\sigma }_{\mathrm{ZH}}$) of the Higgsstrahlung process ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to \mathrm{ZH}$ and the Higgs boson mass ($M_{\mathrm{H}}$) at the International Linear Collider (ILC), using events in which a Higgs boson recoils against a Z boson decaying into a pair of muons or electrons. The analysis is carried out for three center-of-mass energies $\sqrt{s}$ = 250, 350, and 500 GeV, and two beam polarizations ${\mathrm{e}}_{\mathrm{L}}^{-}{\mathrm{e}}_{\mathrm{R}}^{+}$ and ${\mathrm{e}}_{\mathrm{R}}^{-}{\mathrm{e}}_{\mathrm{L}}^{+}$, for which the polarizations of ${\mathrm{e}}^{-}$ and ${\mathrm{e}}^{+}$ are $\left(P{\mathrm{e}}^{-},P{\mathrm{e}}^{+}\right)$ =($-$80\%, +30\%) and (+80\%, $-$30\%), respectively. Assuming an integrated luminosity of 250 $\mathrm{f}{\mathrm{b}}^{-1}$ for each beam polarization at $\sqrt{s}$ = 250 GeV, where the best lepton momentum resolution is obtainable, ${\sigma }_{\mathrm{ZH}}$ and $M_{\mathrm{H}}$ can be determined with a precision of 2.5\% and 37 MeV for ${\mathrm{e}}_{\mathrm{L}}^{-}{\mathrm{e}}_{\mathrm{R}}^{+}$ and 2.9\% and 41 MeV for ${\mathrm{e}}_{\mathrm{R}}^{-}{\mathrm{e}}_{\mathrm{L}}^{+}$, respectively. Regarding a 20 year ILC physics program, the expected precisions for the $\mathrm{HZZ}$ coupling and $M_{\mathrm{H}}$ are estimated to be 0.4\% and 14 MeV, respectively. The event selection is designed to optimize the precisions of ${\sigma }_{\mathrm{ZH}}$ and $M_{\mathrm{H}}$ while minimizing the bias on the measured ${\sigma }_{\mathrm{ZH}}$ due to discrepancy in signal efficiencies among Higgs decay modes. For the first time, model independence has been demonstrated to a sub-percent level for the ${\sigma }_{\mathrm{ZH}}$ measurement at each of the three center-of-mass energies. The results presented show the impact of center-of-mass energy and beam polarization on the evaluated precisons and serve as a benchmark for the planning of the ILC run scenario.

arXiv admin note: substantial text overlap with arXiv:1601.06481; v3: Fix typo in Table I

References in corpus (5)

• 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
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.3 Physics and Manual
• ILC Operating Scenarios

Cited by in corpus (19)

• Improved Formalism for Precision Higgs Coupling Fits
• Quantum information and CP measurement in $H\to {\tau }^{+}{\tau }^{-}$ at future lepton colliders
• Higgs Physics: It ain't over till it's over
• Model-Independent Determination of the Triple Higgs Coupling at $e^{+}{e}^{-}$ Colliders
• Full next-to-leading-order calculations of Higgs boson decay rates in models with non-minimal scalar sectors
• The ILC as a natural SUSY discovery machine and precision microscope: from light higgsinos to tests of unification
• Probing a degenerate-scalar scenario in a pseudoscalar dark-matter model
• Future lepton collider prospects for a ubiquitous composite pseudo-scalar
• Single Higgs Boson Production at Electron-Positron Colliders in Gauge-Higgs Unification
• Prospects of measuring the branching fraction of the Higgs boson decaying into muon pairs at the International Linear Collider
• Probing the Higgs boson-gluon coupling via the jet energy profile at $e^{+}{e}^{-}$ colliders
• Improving the measurement of the Higgs boson-gluon coupling using convolutional neural networks at $e^{+}{e}^{-}$ colliders
• A Case for Future Lepton Colliders
• High energy lepton colliders as the ultimate Higgs microscopes
• One-loop effects of MSSM particles in e^-e^+ \to Zh and e^-e^+ \to ν\barνh at the ILC
• Categorization of two-loop Feynman diagrams in the $\mathcal{O}({\alpha }^2)$ correction to $e^{+}{e}^{-}\to ZH$
• Production of neutral Higgs bosons associated with Z-boson and photon in 2HDM at future lepton colliders
• Next-to-leading-order corrections to the Higgs strahlung process from electron-positron collisions in extended Higgs models
• Riding the Seesaw: What Higgsstrahlung May Reveal about Massive Neutrinos