A New Technique for Determining the Properties of a Narrow $s$-channel Resonance at a Muon Collider

TL;DR

This paper proposes an alternative method for measuring narrow s-channel resonance properties at a muon collider by varying beam energy resolution on resonance, offering improved accuracy over traditional scanning methods.

Contribution

It introduces a novel technique that varies beam energy resolution to determine resonance width and branching ratios more accurately.

Findings

Superior statistical accuracy for light Higgs boson measurements.

Effective for pseudogoldstone bosons with masses above 150 GeV.

Abstract

We explore an alternative to the usual procedure of scanning for determining the properties of a narrow $s$-channel resonance. By varying the beam energy resolution while sitting on the resonance peak, the width and branching ratios of the resonance can be determined. The statistical accuracy achieved is superior to that of the usual scan procedure in the case of a light SM-like Higgs boson with $\mh>130\gev$ or for the lightest pseudogoldstone boson of a strong electroweak breaking model if $\mpzero>150\gev$.