Prospects to Measure the Higgs Boson Mass and Cross Section in ee-->ZH Using the Recoil Mass Spectrum

TL;DR

This paper demonstrates a method to measure the Higgs boson mass and cross section at an electron-positron collider using the recoil mass spectrum against the Z boson, with detailed simulation results.

Contribution

It presents a full simulation study of Higgs measurement via recoil mass spectrum at 250 GeV, showing achievable precision without relying on Higgs decay modes.

Findings

Higgs mass can be measured with 120 MeV precision.

Higgs-strahlung cross section can be measured with 9% accuracy.

Simulation confirms feasibility of recoil mass method at proposed collider energies.

Abstract

The process ee-->ZH allows to measure the Higgs boson in the recoil mass spectrum against the Z boson without any assumptions on the Higgs boson decay. We performed a full simulation and reconstruction of ee-->ZH using the MOKKA and MARLIN packages describing the LDC detector. The Z is reconstructed from its decays into electrons and muons. The mass of the Higgs boson is set to 120 GeV. Assuming a centre-of-mass energy of 250 GeV and an integrated luminosity of 50/fb the Higgs boson mass and the Higgs-strahlung cross section can be measured with a precision of 120 MeV and 9%, respectively.