Addressing the Multi-Channel Inverse Problem at High Energy Colliders: A Model Independent Approach to the Search for New Physics with Trileptons

TL;DR

This paper introduces a model-independent method for interpreting trilepton searches at high energy colliders, enabling the combination of multiple channels to better constrain new physics models beyond supersymmetry.

Contribution

The paper presents a novel approach to analyze trilepton signals in a model-independent way, allowing for broader application to various new physics scenarios at colliders.

Findings

Method successfully combines multichannel sensitivities

Applicable beyond supersymmetry to other models

Enhances interpretation of collider search results

Abstract

We describe a method for interpreting trilepton searches at high energy colliders in a model-independent fashion and apply it to the recent searches at the Tevatron. The key step is to recognize that the trilepton signature is comprised of four experimentally very different channels defined by the number of tau-leptons in the trilepton state. Contributions from these multiple channels to the overall experimental sensitivity (cross section times branching ratio) are model-independent and can be parametrized in terms of relevant new particle masses. Given the trileptonic branching ratios of a specific model, these experimentally obtained multichannel sensitivities can be combined to obtain a cross section measurement that can be used to confront the model with data. Our model-independent results are more widely applicable than the current Tevatron trilepton results which are stated exclusively in terms of mSUGRA parameters of supersymmetry. The technique presented here can be expanded beyond trilepton searches to the more general "inverse problem" of experimentally discriminating between competing models that seek to explain new physics discovered in multiple channels.