Measurement of physical parameters with a weight function method and its application to the Higgs boson mass reconstruction

TL;DR

This paper introduces a novel weight function method for measuring physical parameters that relies solely on lepton energy distributions, demonstrated through Higgs boson mass reconstruction at the LHC.

Contribution

The paper presents a new weight function technique for parameter measurement that minimizes dependence on parent particle velocity, applied to Higgs mass estimation.

Findings

Systematic errors are reduced compared to statistical errors.

Estimated statistical accuracy for Higgs mass is +12% and -14%.

Method is effective in vector boson fusion channel at 14 TeV.

Abstract

We propose a new method to measure various physical parameters, using characteristic weight functions. This method requires only lepton energy distribution and ideally it does not depend on the velocity of the parent particle. We demonstrate an application of this method by simulating a reconstruction of the Higgs boson mass in the H-> WW -> lnu lnu decay mode at the LHC. We show that systematic errors are suppressed compared to statistical errors. In the vector boson fusion channel, the statistical accuracy of the mass determination is estimated to be +12% and -14% at an integrated luminosity of 100fb^{-1}, assuming the Higgs boson mass to be 125GeV and root{s}=14TeV.