Boost-invariant Leptonic Observables and Reconstruction of Parent Particle Mass

TL;DR

This paper introduces boost-invariant lepton energy observables that enable accurate measurement of parent particle properties, such as the Higgs boson mass, regardless of the particle's velocity, enhancing analysis robustness at the LHC.

Contribution

The paper presents a novel class of lepton energy observables that are invariant under boosts for scalar or unpolarized particles, improving mass reconstruction methods.

Findings

Observables are independent of parent particle velocity.

Application demonstrated in Higgs boson mass measurement.

Potential use in various particle property determinations.

Abstract

We propose a class of observables constructed from lepton energy distribution, which are independent of the velocity of the parent particle if it is scalar or unpolarized. These observables may be used to measure properties of various particles in the LHC experiments. We demonstrate their usage in a determination of the Higgs boson mass.