Mass Determination Method for the Right and Left Selectron Above Production Threshold

TL;DR

This paper introduces a robust method for accurately determining right and left selectron and neutralino masses above production threshold, significantly improving resolution and background suppression compared to previous techniques.

Contribution

The paper presents a novel experimental approach that enhances mass resolution and background suppression for selectron and neutralino mass measurements above threshold.

Findings

Mass resolution improved by an order of magnitude.

Effective background suppression achieved.

Method allows determination of leptonic branching ratios.

Abstract

The determination of the masses of Supersymmetric particles such as the Selectron for energies above threshold using the energy end-points method is subject to signal deconvolution difficulties and to Standard Model and Supersymmetric backgrounds. The important features of Right and Left Selectron production are used to design an experimentally robust method both for determining the Left and Right Selectron masses, the Neutralino mass and for suppresing backgrounds. The mass resolution is an order of magnitude better than in previous methods. Additional features, such as the determination of the relative leptonic branching ratios of the selectron decay are present in the method.