Simplified Limits on New LHC Resonances

TL;DR

This paper introduces a simplified, model-independent method for setting bounds on new narrow resonances in collider data, enabling quick comparison of experimental signals with various theoretical models.

Contribution

It presents a novel framework that converts observed cross sections into bounds on branching ratios, facilitating rapid assessment of model viability for potential new physics signals.

Findings

Method applies to resonances decaying to dibosons, diphotons, dileptons, or dijets

Enables quick evaluation of whether models can produce observed signals

Provides a way to compare experimental data with classes of theoretical models

Abstract

If an excess potentially heralding new physics is noticed in collider data, it would be useful to be able to compare the data with entire classes of models at once. This talk discusses a method that applies when the new physics corresponds to the production and decay of a single, relatively narrow, s-channel resonance. A simplifed model of the resonance allows us to convert an estimated signal cross section into model-independent bounds on the product of the branching ratios corresponding to production and decay. This quickly reveals whether a given class of models could possibly produce a signal of the observed size. We will describe how to apply our analysis framework to cases of current experimental interest, including resonances decaying to dibosons, diphotons, dileptons, or dijets.