On the study of the Higgs properties at a muon collider

TL;DR

This paper discusses the potential of muon colliders as Higgs factories, emphasizing the importance of accounting for radiative effects to accurately measure Higgs properties, unlike in electron-positron colliders.

Contribution

It highlights the significant radiative effects in muon collider Higgs measurements and compares them with electron-positron collider scenarios.

Findings

Radiative effects of about 50% impact Higgs width measurements in muon colliders.

Such effects are negligible in electron-positron collider Higgs studies.

Muon colliders require careful correction for radiative effects for precision Higgs property determination.

Abstract

The discovery of the Higgs particle at 125 GeV is demanding a detailed knowledge of the properties of this fundamental component of the Standard Model. To that aim various proposals of electron and muon colliders have been put forward for precision studies of the partial widths of the various decay channels. It is shown that in the case of a Higgs factory through a muon collider, sizeable radiative effects - of order of 50% - must be carefully taken into account for a precise measurement of the leptonic and total widths of the Higgs particle. Similar effects do not apply in the case of Higgs production in electron-positron colliders.